fix: Fix errors detected by smeghead

Co-authored-by: smeghead <[email protected]>

Author: jose-ba

src/DiagramElement/RelationsFilter.php

@@ -112,7 +112,7 @@ function getFilteringRegex(string $filteredClass, string $direction): string
 
         return match ($direction) {
             'in' => "/.*?> ({$filteredClass}$|[\w]+_{$filteredClass}$)/",
-            'out' => "/^({$filteredClass}|^[\w]_+{$filteredClass}) .*?>.*?/",
+            'out' => "/^({$filteredClass}|^[\w]+_{$filteredClass}) .*?>.*?/",
         };
     }
 }