docs: Adjust the update command documentation of the public dashboard endpoint (#77925)

docs/sources/developers/http_api/dashboard_public.md

@@ -111,7 +111,9 @@ Content-Length: 107
 
 ## Update a public dashboard
 
-`PATCH /api/dashboards/uid/:uid/public-dashboards/`
+`PATCH /api/dashboards/uid/:uid/public-dashboards/:publicDashboardUid`
+
+Will update the public dashboard given the specified unique identifier (uid).
 
 **Required permissions**
 
@@ -124,7 +126,7 @@ See note in the [introduction](#public-dashboard-api) for an explanation.
 **Example Request for updating a public dashboard**:
 
 ```http
-PATCH /api/dashboards/uid/xCpsVuc4z/public-dashboards/ HTTP/1.1
+PATCH /api/dashboards/uid/xCpsVuc4z/public-dashboards/cd56d9fd-f3d4-486d-afba-a21760e2acbe HTTP/1.1
 Accept: application/json
 Content-Type: application/json
 Authorization: Bearer eyJrIjoiT0tTcG1pUlY2RnVKZTFVaDFsNFZXdE9ZWmNrMkZYbk