Fix unbalanced tags

Author: PiDelport

index.html

@@ -65,7 +65,7 @@ <h3><a name="welcome-to-github-pages" class="anchor" href=
       We're here</a> to save the day.</p>
 
       <h3><a href=
-      "https://github.com/python-pillow/Pillow">Code</a></h4>
+      "https://github.com/python-pillow/Pillow">Code</a></h3>
 
       <p>Our code is <a href=
       "https://github.com/python-pillow/Pillow">hosted on
@@ -78,7 +78,7 @@ <h3><a href=
       PyPI</a>.</p>
 
       <h3><a href=
-      "https://pillow.readthedocs.io/">Documentation</a></h4>
+      "https://pillow.readthedocs.io/">Documentation</a></h3>
 
       <p>Our documentation is <a href=
       "https://pillow.readthedocs.io/">hosted on readthedocs.io</a>