Update action versions

Author: agibson-godaddy

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       PHP_VERSION: ${{ matrix.php }}
 
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - uses: actions/checkout@v4
 
       - name: Switch to PHP ${{ env.PHP_VERSION }}
         run: |
@@ -59,7 +59,7 @@ jobs:
         run: |
           echo "::set-output name=dir::$(composer config cache-files-dir)"
 
-      - uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+      - uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}