Merge pull request #52589 from lmktfy/20250929_docsy_custom_form_control

Update classes for custom search input

Author: k8s-ci-robot

layouts/partials/search-input-custom.html

@@ -12,9 +12,9 @@
     {{ else }}
     data-search-page="{{ "search/" | relURL }}"
     {{ end }}
-    class="search-input td-search-input"
+    class="search-input custom-form-control td-search-input"
     placeholder="{{ T "ui_search" }}"
     aria-label="{{ T "ui_search" }}"
     autocomplete="off"
   >
-</div>
+</div>