[backport 1.25] Rename subgraph widgets when slot is renamed (#4825)

Co-authored-by: AustinMroz <austin@comfy.org>

src/lib/litegraph/src/subgraph/SubgraphNode.ts

@@ -125,6 +125,9 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
         if (!input) throw new Error('Subgraph input not found')
 
         input.label = newName
+        if (input._widget) {
+          input._widget.label = newName
+        }
       },
       { signal }
     )