Build: update links to blog post (#10636)

Author: humitos

readthedocs/projects/tasks/utils.py

@@ -328,7 +328,7 @@ class DeprecatedBuildImageSiteNotification(SiteNotification):
         'Your project(s) "{{ project_slugs }}" are using the deprecated "build.image" '
         'config on their ".readthedocs.yaml" file. '
         'This config is deprecated in favor of "build.os" and <strong>will be removed on October 16, 2023</strong>. '  # noqa
-        '<a href="https://blog.readthedocs.com/build-image-config-deprecated/">Read our blog post to migrate to "build.os"</a> '  # noqa
+        '<a href="https://blog.readthedocs.com/use-build-os-config/">Read our blog post to migrate to "build.os"</a> '  # noqa
         "and ensure your project continues building successfully."
     )
     failure_level = WARNING_PERSISTENT

readthedocs/templates/builds/build_detail.html

@@ -166,7 +166,7 @@
       {% if build.finished and build.deprecated_build_image_used %}
       <div class="build-ideas">
           <p>
-              {% blocktrans trimmed with config_file_link="https://blog.readthedocs.com/build-image-config-deprecated/" %}
+              {% blocktrans trimmed with config_file_link="https://blog.readthedocs.com/use-build-os-config/" %}
               <strong>Your builds will stop working soon!</strong><br/>
               "build.image" config key is deprecated and it will be removed soon.
               <a href="{{ config_file_link }}">Read our blog post to know how to migrate to new key "build.os"</a>