Update pkgxdev/setup to v4

Author: mxcl

.github/workflows/cd.yml

@@ -90,7 +90,7 @@ jobs:
         with:
           name: srcs
 
-      - uses: pkgxdev/setup@v3
+      - uses: pkgxdev/setup@v4
         with:
           +: ${{ matrix.platform.pkgs }}
 

README.md

@@ -113,7 +113,7 @@ RUN pkgx python@3.10 -m http.server 8000
 <details><summary>CI/CD</summary><br>
 
 ```yaml
-- uses: pkgxdev/setup@v3
+- uses: pkgxdev/setup@v4
 - run: pkgx shellcheck
 ```
 

docs/installing-pkgx.md

@@ -84,7 +84,7 @@ RUN pkgx +node@16 npm start
 ## GitHub Actions
 
 ```yaml
-- uses: pkgxdev/setup@v3
+- uses: pkgxdev/setup@v4
 ```
 
 {% hint style='info' %}