fix(frontend): brain knowledge visibility (#3074)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/studio/[brainId]/BrainManagementTabs/components/KnowledgeTab/KnowledgeTab.tsx

@@ -27,7 +27,7 @@ export const KnowledgeTab = ({
   });
   const { setShouldDisplayFeedCard } = useKnowledgeToFeedContext();
 
-  if (hasEditRights) {
+  if (!hasEditRights) {
     return (
       <div className={styles.knowledge_tab_container}>
         <div className={styles.knowledge_tab_wrapper}>