Bump actions/upload-artifact from 4 to 7

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/release.yml

@@ -38,7 +38,7 @@ jobs:
       - name: Build release artifacts
         run: ./gradlew :app:assembleTraccarRelease
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: traccar-apk
           path: app/build/outputs/apk/traccar/release/sms-messenger-traccar-release.apk
@@ -76,7 +76,7 @@ jobs:
             adb pull /sdcard/launch.png launch.png
             adb shell pidof org.traccar.gateway > /dev/null || { echo "App process not running after launch — crashed."; exit 1; }
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: launch-screenshot
           path: launch.png