Remove border-radius from the navbar

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

fedcode/templates/navbar.html

@@ -1,6 +1,6 @@
 {% load static %}
 
-<nav class="navbar is-dark mb-6 border-bottom-radius" role="navigation" aria-label="main navigation">
+<nav class="navbar is-dark mb-6" role="navigation" aria-label="main navigation">
   <div class="navbar-brand ml-3">
     <a class="navbar-item is-size-4 has-text-weight-bold" href="/">
       FederatedCode<span class="nexb-orange">.</span>io