deploy: searxng on 9563, not 8080

8080 is taken several times over on this box, and the container name is the
only thing addressing it, so the port is ours to pick.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

internal/websearch/searxng.go

@@ -80,7 +80,7 @@ type Options struct {
 	Timeout time.Duration
 }
 
-// New makes a client for a SearXNG base URL like http://searxng:8080.
+// New makes a client for a SearXNG base URL like http://searxng:9563.
 //
 // The instance must have the JSON format enabled (`search.formats: [html,
 // json]` in its settings.yml); a stock install answers 403 to format=json and