build(deps): bump actions/upload-artifact from 4 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/create-release-with-apk.yml

@@ -141,7 +141,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload APK as artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: stadata-example-apk-v${{ steps.get_version.outputs.version }}
           path: ${{ steps.build_apk.outputs.apk_path }}

.github/workflows/generate-changelog.yml

@@ -201,7 +201,7 @@ jobs:
 
       - name: Upload changelog artifact
         if: steps.generate.outputs.changelog_generated == 'true'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: changelog-v${{ steps.version_info.outputs.version }}
           path: |