fix(lock): use disableEdit for duplicate in block menu

Changed duplicate menu item to use disableEdit (which includes lock
check) instead of !userCanEdit for consistency with action bar and
other edit operations.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/block-menu/block-menu.tsx

@@ -175,7 +175,7 @@ export function BlockMenu({
         </PopoverItem>
         {!hasSingletonBlock && (
           <PopoverItem
-            disabled={!userCanEdit}
+            disabled={disableEdit}
             onClick={() => {
               onDuplicate()
               onClose()