docs: update Markdown equation elements

lib/node_modules/@stdlib/stats/base/dists/beta/median/README.md

@@ -36,7 +36,7 @@ the regularized incomplete beta function `I(α,β)` is equal to `0.5`, i.e.
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="\operatorname{Median}\left[ X \right] = I_{\frac{1}{2}}^{[-1]}(\alpha,\beta)" data-equation="eq:beta_median">
-    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@51534079fef45e990850102147e8945fb023d1d0/lib/node_modules/@stdlib/stats/base/dists/beta/median/docs/img/equation_beta_median.svg" alt="Median for a beta distribution.">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@84ee0cacec9c5b0decd77b5ea5f2d8fee77c1f96/lib/node_modules/@stdlib/stats/base/dists/beta/median/docs/img/equation_beta_median.svg" alt="Median for a beta distribution.">
     <br>
 </div> -->
 

lib/node_modules/@stdlib/stats/base/dists/chi/quantile/README.md

@@ -32,6 +32,11 @@ The [quantile function][quantile-function] for a [chi][chi-distribution] random
 Q(p; k) = \sqrt{ 2 \cdot P^{-1}( p, k/2 ) }
 ```
 
+<!-- <div class="equation" align="center" data-raw-text="Q(p; k) = \sqrt{ 2 \cdot P^{-1}( p, k/2 ) }" data-equation="eq:chi_quantile_function">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@84ee0cacec9c5b0decd77b5ea5f2d8fee77c1f96/lib/node_modules/@stdlib/stats/base/dists/chi/quantile/docs/img/equation_chi_quantile_function.svg" alt="Quantile function for a chi distribution.">
+    <br>
+</div> -->
+
 <!-- </equation> -->
 
 for `0 <= p < 1`, where `k` is the degrees of freedom and `P^{-1}` is the inverse of the lower, regularized [incomplete gamma function][@stlib/math/base/special/gammaincinv].

lib/node_modules/@stdlib/stats/base/dists/chisquare/quantile/README.md

@@ -33,7 +33,7 @@ Q(p; k) = 2 \cdot P^{-1}( p, k/2 )
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="Q(p; k) = 2 \cdot P^{-1}( p, k/2 )" data-equation="eq:chisquare_quantile_function">
-    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@51534079fef45e990850102147e8945fb023d1d0/lib/node_modules/@stdlib/stats/base/dists/chisquare/quantile/docs/img/equation_chisquare_quantile_function.svg" alt="Quantile function for a chi-squared distribution.">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@31b92826dc9908a24cedf35e7e63592ce9d6cd69/lib/node_modules/@stdlib/stats/base/dists/chisquare/quantile/docs/img/equation_chisquare_quantile_function.svg" alt="Quantile function for a chi-squared distribution.">
     <br>
 </div> -->
 

lib/node_modules/@stdlib/stats/base/dists/f/quantile/README.md

@@ -33,7 +33,7 @@ Q(p;d_1,d_2) = \,\inf\left\{ x\in [0,+\infty) : p \le F(x;d_1,d_2) \right\}
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="Q(p;d_1,d_2) = \,\inf\left\{ x\in [0,+\infty) : p \le F(x;d_1,d_2) \right\}" data-equation="eq:f_quantile_function">
-    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@591cf9d5c3a0cd3c1ceec961e5c49d73a68374cb/lib/node_modules/@stdlib/stats/base/dists/f/quantile/docs/img/equation_f_quantile_function.svg" alt="Quantile function for an F distribution.">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@84ee0cacec9c5b0decd77b5ea5f2d8fee77c1f96/lib/node_modules/@stdlib/stats/base/dists/f/quantile/docs/img/equation_f_quantile_function.svg" alt="Quantile function for an F distribution.">
     <br>
 </div> -->
 

lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/README.md

@@ -28,10 +28,14 @@ The [quantile function][quantile-function] for a [gamma][gamma-distribution] ran
 
 <!-- <equation class="equation" label="eq:gamma_quantile_function" align="center" raw="Q(p;\alpha,\beta) = \frac{1}{\beta} P^{-1}\left( p, \alpha \right )" data-equation="eq:quantile_function" alt="Quantile function for a Gamma distribution."> -->
 
-<div class="equation" align="center" data-raw-text="Q(p;\alpha,\beta) = \frac{1}{\beta} P^{-1}\left( p, \alpha \right )" data-equation="eq:gamma_quantile_function">
+```math
+Q(p;\alpha,\beta) = \frac{1}{\beta} P^{-1}\left( p, \alpha \right )
+```
+
+<!-- <div class="equation" align="center" data-raw-text="Q(p;\alpha,\beta) = \frac{1}{\beta} P^{-1}\left( p, \alpha \right )" data-equation="eq:gamma_quantile_function">
     <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@591cf9d5c3a0cd3c1ceec961e5c49d73a68374cb/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/docs/img/equation_gamma_quantile_function.svg" alt="Quantile function for a Gamma distribution.">
     <br>
-</div>
+</div> -->
 
 <!-- </equation> -->
 

lib/node_modules/@stdlib/stats/base/dists/t/quantile/README.md

@@ -33,7 +33,7 @@ Q(p;\nu)\,=\,\inf\left\{ x\in \mathbb{R} : p \le F(x;\nu) \right\}
 ```
 
 <!-- <div class="equation" align="center" data-raw-text="Q(p;\nu)\,=\,\inf\left\{ x\in \mathbb{R} : p \le F(x;\nu) \right\}" data-equation="eq:t_quantile_function">
-    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@591cf9d5c3a0cd3c1ceec961e5c49d73a68374cb/lib/node_modules/@stdlib/stats/base/dists/t/quantile/docs/img/equation_t_quantile_function.svg" alt="Quantile function for a Student's t distribution.">
+    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@84ee0cacec9c5b0decd77b5ea5f2d8fee77c1f96/lib/node_modules/@stdlib/stats/base/dists/t/quantile/docs/img/equation_t_quantile_function.svg" alt="Quantile function for a Student's t distribution.">
     <br>
 </div> -->