fix permissions for zsh completions under GHA

.github/workflows/ci.yml

@@ -100,6 +100,7 @@ jobs:
         run: |
           sudo apt-get -y update
           sudo apt-get -y install zsh fish
+          sudo chmod -R 755 /usr/share/zsh/vendor-completions /usr/share/zsh  # Fix permissions for zsh completions
       - name: Install test binary dependencies (macOS)
         if: startsWith(matrix.os, 'macos')
         run: |