theme: Add aria-label attribute to search fields

Closes #2899

layouts/partials/layouts/search/button.html

@@ -10,6 +10,7 @@
     x-data @click="$dispatch('search-toggle')"
   {{ end }}
   type="button"
+  aria-label="Search"
   class="{{ $textColor }} grid cursor-pointer w-full lg:w-56 grid-cols-[auto_1fr_auto] items-center rounded-md px-2 sm:px-4 py-2 text-left text-xs/6 lg:text-sm/6 outline-0 sm:outline-1 -outline-offset-1 outline-gray-600">
   <svg
     class="{{ $fillColor}} pointer-events-none -ml-0.5 mr-2 size-5 sm:size-4">

layouts/partials/layouts/search/results.html

@@ -31,6 +31,7 @@
                 x-model.debounce.100ms="query"
                 @click="search()"
                 type="search"
+                arial-label="Search"
                 class="text-gray-800 dark:text-gray-100 bg-white/40 dark:bg-gray-900 shadow rounded border-0 p-3 w-full"
                 placeholder="Search docs"
                 x-ref="input" />