update html template for docs to fix multiple h1 issue

Author: rossoskull

Makefile

@@ -38,4 +38,4 @@ with-flask:
 	pip3 install -e .[flask]
 
 build-docs:
-	rm -rf html && pdoc --html supertokens_python
+	rm -rf html && pdoc --html supertokens_python --template-dir docs-templates

docs-templates/html.mako

@@ -299,7 +299,7 @@
       <%include file="_lunr_search.inc.mako"/>
     % endif
 
-    <h1>Index</h1>
+    <h2>Index</h2>
     ${extract_toc(module.docstring) if extract_module_toc_into_sidebar else ''}
     <ul id="index">
     % if supermodule: