docs: fix wiki edit message wording (#43541)

Author: 24f3004936

content/communities/documenting-your-project-with-wikis/adding-or-editing-wiki-pages.md

@@ -37,7 +37,7 @@ category:
 {% data reusables.repositories.sidebar-wiki %}
 1. Using the wiki sidebar on the right, navigate to the page you want to change. In the upper-right corner of the page, click **Edit**.
 1. Use the text editor to edit the page's content.
-1. In the "Edit message" field, type a commit message describing the new file you’re adding.
+1. In the "Edit message" field, type a commit message describing the changes you’re making.
 1. To commit your changes to the wiki, click **Save Page**.
 
 ## Adding or editing wiki pages locally