message: docs(common): fix a typo in a debounce requests example header
  Remove the extra parenthesis from a debounce requests example.
  There are no associated issues.
  PR Close
diff: @@ -476,7 +476,7 @@ That's easy to implement with RxJS operators, as shown in this excerpt.
  <code-example
  path="http/src/app/package-search/package-search.component.ts"
  region="debounce"
  - header="app/package-search/package-search.component.ts (excerpt))">
  + header="app/package-search/package-search.component.ts (excerpt)">
  </code-example>
  The `searchText$` is the sequence of search-box values coming from the user.
  