fix(ci): trigger docker publish on tag push instead of release event

GitHub Actions events created by GITHUB_TOKEN don't trigger other
workflows. Changed trigger from 'release: published' to 'push: tags'
so docker-publish runs directly from the tag push.

.github/workflows/docker-publish.yml

@@ -1,8 +1,9 @@
 name: Docker Hub Release
 
 on:
-  release:
-    types: [published]
+  push:
+    tags:
+      - "v*"
   workflow_dispatch:
     inputs:
       version: