Update app.py

app.py

@@ -734,6 +734,7 @@ class FAADocumentChecker(DocumentChecker):
     # Constructor
     def __init__(self, config_path: Optional[str] = None):
         super().__init__(config_path)
+        self.HEADING_WORDS = HEADING_WORDS
 
     # Core Check Methods
     @profile_performance