Upgrade "actions/checkout" to non-deprecated version

.github/workflows/brakeman-analysis.yml

@@ -23,7 +23,7 @@ jobs:
     steps:
     # Checkout the repository to the GitHub Actions runner
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Customize the ruby version depending on your needs
     - name: Setup Ruby

.github/workflows/build.yml

@@ -45,7 +45,7 @@ jobs:
           - "engines/*/spec"
       fail-fast: false
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -92,7 +92,7 @@ jobs:
           POSTGRES_USER: ofn
           POSTGRES_PASSWORD: f00d
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1

.github/workflows/linters.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: prettier
         uses: EPMatt/reviewdog-action-prettier@v1
         with:

.github/workflows/mapi.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: true
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - run: docker/build
     - run: docker-compose up --detach
     - run: until curl -f -s http://localhost:3000; do echo "waiting for api server"; sleep 1; done