Fix rendering of markdown headers in docs

Author: wookie184

bot/exts/info/doc/_markdown.py

@@ -31,7 +31,7 @@ def convert_li(self, el: PageElement, text: str, convert_as_inline: bool) -> str
             bullet = bullets[depth % len(bullets)]
         return f"{bullet} {text}\n"
 
-    def convert_hn(self, _n: int, el: PageElement, text: str, convert_as_inline: bool) -> str:
+    def _convert_hn(self, _n: int, el: PageElement, text: str, convert_as_inline: bool) -> str:
         """Convert h tags to bold text with ** instead of adding #."""
         if convert_as_inline:
             return text

tests/bot/exts/info/doc/test_parsing.py

@@ -96,6 +96,7 @@ def test_surrounding_whitespace(self):
         test_cases = (
             ("<p>Hello World</p>", "Hello World"),
             ("<p>Hello</p><p>World</p>", "Hello\n\nWorld"),
+            ("<h1>Title</h1>", "**Title**")
         )
         self._run_tests(test_cases)