chore: Bump actions/upload-artifact from 4 to 7 in /.github/workflows

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/pull-request.yml

@@ -29,7 +29,7 @@ jobs:
           mkdir -p ./pr
           echo ${{ github.event.number }} > ./pr/NR
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: pr
           path: pr/

.github/workflows/push-event.yml

@@ -89,13 +89,13 @@ jobs:
           VERSION_CODE: ${{needs.common.outputs.VERSION_CODE}}
 
       - name: Upload APK
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: APK Generated
           path: build/app/outputs/flutter-apk
 
       - name: Upload AAB Release
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: AAB Generated
           path: build/app/outputs/bundle