[3.13] pythongh-125909: Avoid a redirect when linking to the devguide (…

…pythonGH-125826) (python#125929)

(cherry picked from commit 5003ad5)

Co-authored-by: partev <petrosyan@gmail.com>

Doc/tools/templates/indexcontent.html

@@ -59,7 +59,7 @@ <h1>{{ docstitle|e }}</h1>
   <table class="contentstable" align="center"><tr>
     <td width="50%">
       <p class="biglink"><a class="biglink" href="{{ pathto("bugs") }}">{% trans %}Reporting issues{% endtrans %}</a></p>
-      <p class="biglink"><a class="biglink" href="https://devguide.python.org/docquality/#helping-with-documentation">{% trans %}Contributing to Docs{% endtrans %}</a></p>
+      <p class="biglink"><a class="biglink" href="https://devguide.python.org/documentation/help-documenting/">{% trans %}Contributing to Docs{% endtrans %}</a></p>
       <p class="biglink"><a class="biglink" href="{{ pathto("download") }}">{% trans %}Download the documentation{% endtrans %}</a></p>
     </td><td width="50%">
       <p class="biglink"><a class="biglink" href="{{ pathto("license") }}">{% trans %}History and license of Python{% endtrans %}</a></p>