CI: upload OpenTTD to Play Store beta

.github/workflows/openttd.yml

@@ -143,3 +143,17 @@ jobs:
           name: ${{env.APP_NAME}}
           path: upload
           if-no-files-found: error
+
+      - uses: r0adkll/upload-google-play@v1
+        with:
+          serviceAccountJsonPlainText: ${{secrets.SERVICE_ACCOUNT_JSON}}
+          packageName: org.openttd.sdl
+          releaseFiles: upload/*.aab
+          track: beta
+          #track: production
+          status: completed
+          # inAppUpdatePriority: 2
+          # userFraction: 1
+          # whatsNewDirectory: distribution/whatsnew
+          # mappingFile: app/build/outputs/mapping/release/mapping.txt
+          # debugSymbols: app/intermediates/merged_native_libs/release/out/lib