Update workflows. (#74)

.github/workflows/build-2.x.yml

@@ -49,12 +49,12 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           path: build_dir
 
       - name: Checkout islandora_ci
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: islandora/islandora_ci
           ref: github-actions
@@ -72,7 +72,7 @@ jobs:
           sudo apt-get install -y mysql-client
 
       - name: Cache Composer dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: /tmp/composer-cache
           key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}