[Improvement]: Clarify that the only type of searches that work in fo…

…rks are repository searches and code searches (#48302)

content/search-github/searching-on-github/searching-in-forks.md

@@ -20,7 +20,7 @@ To show forks in repository search results, add `fork:true` or `fork:only` to yo
 
 {% note %}
 
-**Note:** Searching for commits is not supported for forks.
+**Note:**  Forks can only be included in repository and code searches.
 
 {% endnote %}