Update php.yml (#218)

Author: rmcdaniel

.github/workflows/php.yml

@@ -34,7 +34,7 @@ jobs:
         - 6379:6379
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
           fetch-depth: 10
 
@@ -43,7 +43,7 @@ jobs:
 
     - name: Cache Composer packages
       id: composer-cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: vendor
         key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}