fix(knowledge): gate document tags menu item on edit permission

Matches the existing disableRename/disableDelete/disableToggleEnabled pattern; the document detail breadcrumb already hides its Tags entry for non-editors the same way.

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/knowledge/[id]/base.tsx

@@ -1430,7 +1430,7 @@ export function KnowledgeBase({
             : undefined
         }
         onViewTags={
-          contextMenuDocument && selectedDocuments.size === 1
+          contextMenuDocument && selectedDocuments.size === 1 && userPermissions.canEdit
             ? () => handleViewDocumentTags(contextMenuDocument)
             : undefined
         }