Upgrade actions/checkout

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           cache: true

.github/workflows/gh-release.yml

@@ -18,7 +18,7 @@ jobs:
       SECRET: ${{ secrets.SECRET }}
     steps:
       - name: Checkout Frosty repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       
       # Setup Java so that we can build the APK.
       - name: Set up Java

.github/workflows/pr-check.yml

@@ -7,7 +7,7 @@ jobs:
     name: Check and test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           cache: true

.github/workflows/store-release.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout Frosty repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       
       # Install Ruby and install/cache dependencies with bundler in order to use fastlane.
       - name: Set up Ruby and Bundler
@@ -78,7 +78,7 @@ jobs:
       MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}
     steps:
       - name: Checkout Frosty repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         
       # Install Ruby and install/cache dependencies with bundler in order to use fastlane.
       - name: Set up Ruby and Bundler