build(deps): bump actions/checkout from 2 to 3

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...c85c95e3d7251135ab7dc9ce3241c5835cc595a9)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/publish.yaml

@@ -17,7 +17,7 @@ jobs:
       build_number: ${{ steps.build_number.outputs.BUILD_NUMBER }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set flutter version
         id: flutter_version
@@ -32,7 +32,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - uses: subosito/flutter-action@v2
         with:
           flutter-version: ${{ needs.setup.outputs.flutter_version }}
@@ -93,7 +93,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - uses: subosito/flutter-action@v2
         with:
           flutter-version: ${{ needs.setup.outputs.flutter_version }}
@@ -128,7 +128,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set docker image
         id: docker_image
         run: |