ci: bump actions cache

Author: williamdes

.github/workflows/tests.yml

@@ -29,7 +29,7 @@ jobs:
               id: composer-cache
               run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
             - name: Restore cache
-              uses: actions/cache@v3
+              uses: actions/cache@v4
               with:
                 path: ${{ steps.composer-cache.outputs.dir }}
                 key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}