Update max assignee limit from 1 to 10 (#58046)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: mc <[email protected]>

Author: 3 people

content/issues/tracking-your-work-with-issues/using-issues/assigning-issues-and-pull-requests-to-other-github-users.md

@@ -27,7 +27,7 @@ You may also be able to assign {% data variables.product.prodname_copilot_short
 
 {% endif %}
 
-Issues and pull requests in public repositories, and in private repositories for a paid account, can have up to 10 people assigned. Private repositories on the free plan are limited to one person per issue or pull request.
+Both issues and pull requests support up to 10 assignees.
 
 ## Assigning an individual issue or pull request