Fix website directory trigger

ChatGPT claims we need the splat splat to trigger from directory
contents.

Also add a manual trigger so I don't need to commit in order to rebuild.

.github/workflows/publish_website_docker_image.yaml

@@ -4,7 +4,8 @@ on:
   push:
     paths: 
       - Dockerfile
-      - website
+      - 'website/**'
+  workflow_dispatch:
 
 jobs:
   build: