[CI] Replace tea with pkgx (#371)

Author: davdroman

.github/workflows/ci.yml

@@ -104,8 +104,8 @@ jobs:
       - name: Git Checkout
         uses: actions/checkout@v4
 
-      - name: Set up tea environment
-        uses: teaxyz/setup@v1
+      - name: Set up pkgx environment
+        uses: pkgxdev/setup@v1
         with:
           +: xcodes