[Glitch] fix: Hide FamiliarFollowers widget when logged out

Port 865a30ab0d to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/account_timeline/components/account_header.tsx

@@ -993,7 +993,7 @@ export const AccountHeader: React.FC<{
                   ))}
                 </div>
               </div>
-              <FamiliarFollowers accountId={accountId} />
+              {signedIn && <FamiliarFollowers accountId={accountId} />}
             </div>
           )}
         </div>