fix: correct userGroups intersection check for federation access

Signed-off-by: Sanskar Soni <[email protected]>

lib/Config.php

@@ -108,7 +108,7 @@ public function isFederationEnabledForUserId(IUser $user): bool {
 		}
 
 		$userGroups = $this->groupManager->getUserGroupIds($user);
-		return empty(array_intersect($allowedGroups, $userGroups));
+		return !empty(array_intersect($allowedGroups, $userGroups));
 	}
 
 	public function isBreakoutRoomsEnabled(): bool {