chore(deps): update ramsey/composer-install action to v4

Author: renovate[bot]

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
           composer global require --no-progress --no-scripts --no-plugins symfony/flex
 
       - name: Install Composer dependencies
-        uses: ramsey/composer-install@v3
+        uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # 4.0.0
         with:
           dependency-versions: "${{ matrix.dependencies }}"
         env: