docs: mention SyncMLViewer for local Windows MDM testing (#40174)

- `articles/custom-os-settings.md`: Added one sentence to the Windows
section: "For local testing on Windows,
[SyncMLViewer](https://github.com/okieselbach/SyncMLViewer/releases) is
a useful GUI tool for inspecting MDM traffic."
- `website/views/pages/os-settings.ejs`: Added a matching list item to
the Windows platform section on the `fleetdm.com/os-settings` page,
mirroring the iMazing mention in the Apple section.

articles/custom-os-settings.md

@@ -6,7 +6,7 @@ In Fleet you can enforce OS settings like security restrictions, screen lock, Wi
 
 For macOS, iOS, and iPadOS hosts, Fleet recommends the [iMazing Profile Creator](https://imazing.com/profile-editor) tool for creating and exporting macOS configuration profiles. Fleet signs these profiles for you. If you have self-signed profiles, run this command to unsign them: `/usr/bin/security cms -D -i  /path/to/profile/profile.mobileconfig | xmllint --format -`
 
-For Windows hosts, copy this [Windows configuration profile template](https://fleetdm.com/example-windows-profile) and update the profile using any [configuration service providers (CSPs)](https://fleetdm.com/guides/creating-windows-csps) from [Microsoft's MDM protocol](https://learn.microsoft.com/en-us/windows/client-management/mdm/).
+For Windows hosts, copy this [Windows configuration profile template](https://fleetdm.com/example-windows-profile) and update the profile using any [configuration service providers (CSPs)](https://fleetdm.com/guides/creating-windows-csps) from [Microsoft's MDM protocol](https://learn.microsoft.com/en-us/windows/client-management/mdm/). For local testing on Windows, [SyncMLViewer](https://github.com/okieselbach/SyncMLViewer/releases) is a useful GUI tool for inspecting MDM traffic.
 
 For Android hosts, copy this [Android configuration profile template](https://fleetdm.com/learn-more-about/example-android-profile) and update the profile using the options available in [Android Management API](https://developers.google.com/android/management/reference/rest/v1/enterprises.policies#resource:-policy). To learn how, watch [this video](https://youtu.be/Jk4Zcb2sR1w).
 

website/views/pages/os-settings.ejs

@@ -49,7 +49,8 @@
           </div>
           <div purpose="platform-content" v-if="selectedPlatform === 'windows'">
             <ul>
-              <li><p>Check out Fleet’s <a href="/vitals/battery#windows">built-in checks</a> for Windows.</p></li>
+              <li><p>For local testing on Windows, <a href="https://github.com/okieselbach/SyncMLViewer/releases" target="_blank">SyncMLViewer</a> is a useful GUI tool for inspecting MDM traffic.</p></li>
+              <li><p>Check out Fleet's <a href="/vitals/battery#windows">built-in checks</a> for Windows.</p></li>
               <li><p>View the complete <a href="https://learn.microsoft.com/en-us/windows/client-management/mdm/" target="_blank">Windows docs</a>.</p></li>
               <li><p>Need more help? join us in the <a href="/support">support channel</a>.</p></li>
             </ul>