Ensure search input always has regex language synced with search_options state (#25811)

Follow-up to https://github.com/zed-industries/zed/pull/25797

Release Notes:

- N/A

crates/search/src/project_search.rs

@@ -894,6 +894,7 @@ impl ProjectSearchView {
                             editor.set_text(old_query.as_str(), window, cx);
                         });
                         search_view.search_options = SearchOptions::from_query(&old_query);
+                        search_view.adjust_query_regex_language(cx);
                     }
                 }
                 new_query