Fix Windows-build

Author: tvdijen

.github/workflows/php.yml

@@ -143,9 +143,11 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Get composer cache directory
-        run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$env:GITHUB_ENV"
+        shell: bash
+        run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
 
       - name: Get COMPOSER_ROOT_VERSION from composer.json branch alias
+        shell: bash
         run: |
             ROOT_VERSION=$(composer config extra.branch-alias.dev-master)
             if [ -z "$ROOT_VERSION" ]; then