docs: fix developer preview link in signal queries (#54492)

PR Close #54492

aio/content/guide/signal-queries.md

@@ -9,8 +9,10 @@ There are two categories of query: view queries and content queries.
 Signal queries supply query results as a reactive signal primitive. You can use query results in `computed` and `effect`, composing these results with other signals.
 
 <div class="alert is-helpful">
+
 Signal queries are in [developer preview](/guide/releases#developer-preview).
 APIs may change based on feedback without going through Angular's deprecation cycle.
+
 </div>
 
 If you're already familiar with Angular queries, you can jump straight to [Comparing signal-based queries to decorator-based queries](#comparing-signal-based-queries-to-decorator-based-queries)