ci: change upload release asset action

.github/workflows/relesase.yml

@@ -4,6 +4,9 @@ on:
     tags:
       - "v*.*.*"
 
+env:
+  PLUGIN_SLUG: alt-text-generator-gpt-vision
+
 jobs:
   deploy:
     name: Deploy to WP.org
@@ -35,15 +38,11 @@ jobs:
         env:
           SVN_USERNAME: ${{ secrets.SVN_USERNAME }}
           SVN_PASSWORD: ${{ secrets.SVN_PASSWORD }
-          SLUG: alt-text-generator-gpt-vision
+          SLUG: ${{ env.PLUGIN_SLUG }}
 
       - name: Upload release asset
-        uses: actions/upload-release-asset@v1
+        uses: softprops/action-gh-release@v1
+        with:
+          files: ${{github.workspace}}/${{ env.PLUGIN_SLUG }}.zip
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-        with:
-          upload_url: ${{ github.event.release.upload_url }}
-          asset_path: ${{ steps.deploy.outputs.zip-path }}
-          asset_name: ${{ github.event.repository.name }}.zip
-          asset_content_type: application/zip