Fix attach files to release path

Author: saikrishna321

.github/workflows/publish.yml

@@ -43,8 +43,8 @@ jobs:
         uses: softprops/action-gh-release@v2
         with:
           files: |
-            $GITHUB_WORKSPACE/app-debug.apk
-            $GITHUB_WORKSPACE/ios.zip
+            ${{ github.workspace }}/app-debug.apk
+            ${{ github.workspace }}/ios.zip
       - name: Update Flutter Driver with Version
         run: |
          TAG_NAME=$(curl -s "https://api.github.com/repos/AppiumTestDistribution/appium-flutter-server/tags" | grep -m 1 '"name"' | sed -E 's/.*"name": "([^"]+)".*/\1/')