Bump actions/checkout from 3 to 4 in /.github/workflows

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
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/build_apk.yml

@@ -6,7 +6,7 @@ jobs:
     name: Build Android Artifact
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-java@v2
       with:
         distribution: 'zulu'
@@ -23,7 +23,7 @@ jobs:
     name: Build IOS Artifact
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: dart-lang/setup-dart@v1
     - uses: subosito/flutter-action@v2
       with: