Update markdown parser for new heading parsing

python-markdownify 1.2.0 changed the _convert_hN method on
MarkdownConverters public (and renamed to convert_hN). Functionality
remains the same, just needs a rename of the method.

Author: jb3

bot/exts/info/doc/_markdown.py

@@ -30,7 +30,7 @@ def convert_li(self, el: PageElement, text: str, parent_tags: set[str]) -> str:
             bullet = bullets[depth % len(bullets)]
         return f"{bullet} {text}\n"
 
-    def _convert_hn(self, _n: int, el: PageElement, text: str, parent_tags: set[str]) -> str:
+    def convert_hN(self, _n: int, el: PageElement, text: str, parent_tags: set[str]) -> str: # noqa: N802
         """Convert h tags to bold text with ** instead of adding #."""
         if "_inline" in parent_tags:
             return text