fix: slack messages from CI (#2651)

.github/workflows/pr_test_build_android.yml

@@ -313,15 +313,16 @@ jobs:
           apk_file=$(ls build/app/outputs/flutter-apk/test-apk/${BRANCH_NAME}.apk || exit 1)
           echo "APK_FILE=$apk_file" >> $GITHUB_ENV
 
-      - name: Upload artifact to slack
-        if: ${{ !contains(env.message, 'skip slack') }}
-        continue-on-error: true
-        uses: adrey/slack-file-upload-action@1.0.5
+      - name: Upload to slack step
+        uses: vaporif/slack-file-upload-action@v1
         with:
           token: ${{ secrets.SLACK_APP_TOKEN }}
-          path: ${{ env.APK_FILE }}
-          channel: ${{ secrets.SLACK_APK_CHANNEL }}
           initial_comment: ${{ env.message }}
+          files: >
+            [
+              {"file": "${{ env.APK_FILE }}", "filename": "${{ env.BRANCH_NAME }}.apk"}
+            ]
+          channel_id: ${{ secrets.SLACK_APK_CHANNEL }}
 
       - name: cleanup
         run: rm -rf build/app/outputs/flutter-apk/test-apk/