[October 15, 2021] Add deprecation note for Windows Server 2016 that will be retired in March (#20580)

Co-authored-by: Mikhail Timofeev <48208649+miketimofeev@users.noreply.github.com>
Co-authored-by: Sarah Edwards <skedwards88@github.com>

Author: 3 people

data/reusables/github-actions/supported-github-runners.md

@@ -30,12 +30,13 @@ Windows Server 2019
 </tr>
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 <td>
-Windows Server 2016
+Windows Server 2016<sup>[deprecated]</sup>
 </td>
 <td>
 <code>windows-2016</code>
 </td>
 <td>
+Migrate to Windows 2019 or Windows 2022. For more information, see  <A href="https://github.blog/changelog/2021-10-19-github-actions-the-windows-2016-runner-image-will-be-removed-from-github-hosted-runners-on-march-15-2022/">the blog post</A>.
 </td>
 </tr>
 <tr>
@@ -84,6 +85,6 @@ macOS Catalina 10.15
 
 {% warning %}
 
-<b>Note:</b> Beta Images are provided "as-is", "with all faults" and "as available" and are excluded from the service level agreement and warranty. Beta Images may not be covered by customer support. 
+<b>Note:</b> Beta and Deprecated Images are provided "as-is", "with all faults" and "as available" and are excluded from the service level agreement and warranty. Beta Images may not be covered by customer support. 
 
 {% endwarning %}