Template: fix build details page link (#9662)

readthedocs/templates/builds/build_detail.html

@@ -178,7 +178,7 @@
     {% if build.finished and build.config.build.commands %}
     <div class="build-ideas">
       <p>
-        {% blocktrans trimmed with config_file_link="https://docs.readthedocs.io/page/build-customization.html#override-the-build-process-completely" %}
+        {% blocktrans trimmed with config_file_link="https://docs.readthedocs.io/page/build-customization.html#override-the-build-process" %}
         <strong>The <code>"build.commands"</code> feature is in beta, and could have backwards incompatible changes while in beta.</strong>
         Read more at <a href="{{ config_file_link }}">our documentation</a> to find out its limitations and potential issues.
         {% endblocktrans %}