Create AutoLabelMsftContributor-PrCloseMessage.md

Author: dstrome

.github/workflows/resources/AutoLabelMsftContributor-PrCloseMessage.md

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+Thank you for your contribution! To reduce the chances of pre-release content being released publicly, and to simplify the contribution workflow, Microsoft FTEs and vendors must submit contributions to **private repositories**. Private repositories typically have the same name as public repositories with the **-pr** suffix added.
+
+For example, if the public repository name is `contoso-help`, the private repository name is usually `contoso-help-pr`.
+
+Please re-submit your contribution to the private repository. If you can’t find the private repository to use, do one of the following:
+
+- **(Preferred)** Go to <https://aka.ms/SaveTime> and paste the public Learn URL of the page you want to update into the field provided.
+- Retrieve the article source URL from page source:  
+  1. Right-click on the article page and select **View source**.  
+  2. Find *original_content_git_url* and paste that URL into the address bar of a new tab.  
+  3. Click **Edit** and follow the steps to update the article.
+- Install the **Microsoft Learn maintenance tool** and, while on the article you want to update, click the extension in the toolbar, then choose **MD** or **YML**.
+
+If you have questions or need help, please post a message to [G+E LMC Support (aka AskAnAdmin)](https://aka.ms/askanadmin) (Microsoft FTE or vendor login required).