Add ARIA search landmark to documentation. (#28983)

diff --git a/site/_includes/docs-sidebar.html b/site/_includes/docs-sidebar.html
index d2d47a57d8b5d09b021fed599f8f46d71777b62d..3f5dfb8fcb78f7a7415605c990e823d368309729 100644 (file)
--- a/site/_includes/docs-sidebar.html
+++ b/site/_includes/docs-sidebar.html
@@ -1,4 +1,4 @@
-<form class="bd-search d-flex align-items-center">
+<form role="search" class="bd-search d-flex align-items-center">
   <input type="search" class="form-control" id="search-input" placeholder="Search..." aria-label="Search for..." autocomplete="off" data-docs-version="{{ site.docs_version }}">
   <button class="btn btn-link bd-search-docs-toggle d-md-none p-0 ml-3" type="button" data-toggle="collapse" data-target="#bd-docs-nav" aria-controls="bd-docs-nav" aria-expanded="false" aria-label="Toggle docs navigation">
     {%- include icons/menu.svg width="30" height="30" -%}