Fix CI erroneously publishing releases

#568 (comment)

https://github.com/Authenticator-Extension/Authenticator/actions/runs/428655220

Author: mymindstorm

.github/workflows/release.yml

@@ -1,7 +1,7 @@
 name: Release
 
 on:
-  create:
+  push:
     tags: 
       - v*
 
@@ -43,4 +43,4 @@ jobs:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: ./release.tar.gz
           asset_name: release.tar.gz
-          asset_content_type: application/gzip
+          asset_content_type: application/gzip