Update some learn.microsoft.com to point to this repo now

Author: keveleigh

README.md

@@ -64,7 +64,7 @@ MRTK3 requires Unity 2021.3.21 or higher. In addition, you need the [Mixed Reali
 
 ## Getting started
 
-[Follow the documentation for setting up MRTK3 packages as dependencies in your project here.](https://learn.microsoft.com/windows/mixed-reality/mrtk-unity/mrtk3-overview/getting-started/setting-up/setup-new-project) Alternatively, you can clone this repo directly to experiment with our template project. However, we *strongly* recommend adding MRTK3 packages as dependencies through the Feature Tool, as it makes updating, managing, and consuming MRTK3 packages far easier and less error-prone.
+[Follow the documentation for setting up MRTK3 packages as dependencies in your project here.](./docs/mrtk3-overview/getting-started/setup-new-project.md) Alternatively, you can clone this repo directly to experiment with our template project. However, we *strongly* recommend adding MRTK3 packages as dependencies through the Feature Tool, as it makes updating, managing, and consuming MRTK3 packages far easier and less error-prone.
 
 ## Supported devices
 

contributions/code-contributions.md

@@ -2,13 +2,13 @@
 
 This project is an open source project under the BSD 3-Clause license. Community contributions are welcome and appreciated, both for new features and bug fixes.
 
-Contributing to this project is easy. We recommend using the `MRTKDevTemplate` Unity project as a convenient development testbed, as it already includes all of the Project packages as local on-disk dependencies. See [Exploring MRTK3 sample scenes](https://learn.microsoft.com/windows/mixed-reality/mrtk-unity/mrtk3-overview/getting-started/exploring-features/mrtk3-sample-scenes) for more information on how to use this Unity project.
+Contributing to this project is easy. We recommend using the `MRTKDevTemplate` Unity project as a convenient development testbed, as it already includes all of the Project packages as local on-disk dependencies. See [Exploring MRTK3 sample scenes](../docs/mrtk3-overview/getting-started/mrtk3-sample-scenes.md) for more information on how to use this Unity project.
 
 ## Contribution guide
 
 1. Fork the Project repository to your GitHub account.
 
-2. Clone your forked Project repository by following our guide on [starting from a template project](https://learn.microsoft.com/windows/mixed-reality/mrtk-unity/mrtk3-overview/getting-started/setting-up/setup-new-project) Ensure you have the required tooling, especially the correct Unity version. To ensure you are on the right branch, clone using the command:
+2. Clone your forked Project repository by following our guide on [starting from a template project](../docs/mrtk3-overview/getting-started/setup-new-project.md) Ensure you have the required tooling, especially the correct Unity version. To ensure you are on the right branch, clone using the command:
 
     ``
     git clone --branch main YOUR_GIT_URL

org.mixedrealitytoolkit.core/Editor/MRTKProjectValidation.cs

@@ -122,7 +122,7 @@ private static BuildValidationRule GenerateProfileRule(BuildTargetGroup buildTar
                 AssetDatabase.LoadAssetAtPath<MRTKProfile>(AssetDatabase.GUIDToAssetPath(DefaultMRTKProfileGuid))),
                 FixItMessage = $"Assign the default MRTK3 profile for the {buildTargetGroup} build target",
                 Error = false,
-                HelpLink = "https://learn.microsoft.com/windows/mixed-reality/mrtk-unity/mrtk3-overview/getting-started/setting-up/setup-new-project#4-configure-mrtk-profile-after-import"
+                HelpLink = "https://mixedrealitytoolkit.github.io/MixedRealityToolkit-Unity/mrtk3-overview/getting-started/setting-up/setup-new-project.html#4-configure-mrtk-profile-after-import"
             };
         }