updated to reference write permissions (github#15487)

* updated to reference write permissions

* Update content/pull-requests/collaborating-with-pull-requests/incorporating-changes-from-a-pull-request/reverting-a-pull-request.md

Co-authored-by: hubwriter <[email protected]>

* Update content/pull-requests/collaborating-with-pull-requests/incorporating-changes-from-a-pull-request/reverting-a-pull-request.md

Co-authored-by: hubwriter <[email protected]>

Co-authored-by: hubwriter <[email protected]>

Author: cmwilson21

content/pull-requests/collaborating-with-pull-requests/incorporating-changes-from-a-pull-request/reverting-a-pull-request.md

@@ -16,7 +16,7 @@ topics:
 ---
 ## About reverting a pull request
 
-Reverting a pull request on {% data variables.product.product_name %} creates a new pull request that contains one revert of the merge commit from the original merged pull request.
+Reverting a pull request on {% data variables.product.product_name %} creates a new pull request that contains one revert of the merge commit from the original merged pull request. To revert pull requests, you must have [write permissions](/organizations/managing-access-to-your-organizations-repositories/repository-roles-for-an-organization) in the repository. 
 
 ## Reverting a pull request
 
@@ -33,6 +33,6 @@ For more information about using Git to manually revert individual commits, see
 
 {% data reusables.repositories.sidebar-pr %}
 2. In the "Pull Requests" list, click the pull request you'd like to revert.
-3. Near the bottom of the pull request, click **Revert**.
+3. Near the bottom of the pull request, click **Revert**. If the **Revert** option isn't displayed, you'll need to ask the repository administrator for write permissions.
   ![Revert pull request link](/assets/images/help/pull_requests/revert-pull-request-link.png)
 4. Merge the resulting pull request. For more information, see "[Merging a pull request](/pull-requests/collaborating-with-pull-requests/incorporating-changes-from-a-pull-request/merging-a-pull-request)."