chore(deps): update actions/cache action to v4

Author: renovate[bot]

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
           extensions: mbstring
 
       - name: "Cache dependencies"
-        uses: "actions/cache@v2"
+        uses: "actions/cache@v4"
         with:
           path: "~/.composer/cache"
           key: "php-${{ matrix.php-version }}-composer-${{ hashFiles('**/composer.json') }}"

.github/workflows/code_coverage.yaml

@@ -20,7 +20,7 @@ jobs:
       id: composer-cache
       run: |
         echo "::set-output name=dir::$(composer config cache-files-dir)"
-    - uses: actions/cache@v1
+    - uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
         key: ${{ runner.os }}-php8.3-composer-${{ hashFiles('**/composer.json') }}