fix: search bar accessibility in dark theme system. (#267)

Author: Revathyvenugopal162

src/ansys_sphinx_theme/theme/ansys_sphinx_theme/components/search-field.html

@@ -41,7 +41,6 @@
       apiKey: "{{ API_KEY }}",
       indexUid: "{{ theme_use_meilisearch.index_uids.items()|first|first }}",
       inputSelector: "#search-bar-input",
-      enableDarkMode: "auto",
       debug: true, // Set debug to true if you want to inspect the dropdown
       meilisearchOptions: {
         limit: 1000,