Merge pull request #3934 from RosarioPulella/inheritDoc-fix

InheritDoc fails when there are more than one source xml doc for a specified target.
This is from "Nerdbank.GitVersioning" project and is not an issue here.

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## Fixes InheritDoc build issue
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<!-- Add a brief overview here of the feature/bug & fix. -->
The inherit doc step started to fail, this fixes it.

## PR Type
What kind of change does this PR introduce?
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- Bugfix
<!-- - Feature -->
<!-- - Code style update (formatting) -->
<!-- - Refactoring (no functional changes, no api changes) -->
- Build or CI related changes
<!-- - Documentation content changes -->
<!-- - Sample app changes -->
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## What is the current behavior?
<!-- Please describe the current behavior that you are modifying, or link to a relevant issue. -->
All branches without this change are failing the inherit doc build step.

## What is the new behavior?
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Inherit doc build step doesn't fail 

## PR Checklist

Please check if your PR fulfills the following requirements:

- [ ] Tested code with current [supported SDKs](../readme.md#supported)
- [ ] Pull Request has been submitted to the documentation repository [instructions](..\contributing.md#docs). Link: <!-- docs PR link -->
- [ ] Sample in sample app has been added / updated (for bug fixes / features)
    - [ ] Icon has been created (if new sample) following the [Thumbnail Style Guide and templates](https://github.com/windows-toolkit/WindowsCommunityToolkit-design-assets)
- [ ] New major technical changes in the toolkit have or will be added to the [Wiki](https://github.com/windows-toolkit/WindowsCommunityToolkit/wiki) e.g. build changes, source generators, testing infrastructure, sample creation changes, etc...
- [ ] Tests for the changes have been added (for bug fixes / features) (if applicable)
- [ ] Header has been added to all new source files (run *build/UpdateHeaders.bat*)
- [ ] Contains **NO** breaking changes

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## Other information

Author: Rosuavio

build/build.cake

@@ -43,7 +43,10 @@ var stylerFile = baseDir + "/settings.xamlstyler";
 string Version = null;
 
 var inheritDoc = toolsDir + "/InheritDoc/tools/InheritDoc.exe";
-var inheritDocExclude = "Foo.*";
+
+// Ignoring NerdBank until this is merged and we can use a new version of inheridoc:
+// https://github.com/firesharkstudios/InheritDoc/pull/27
+var inheritDocExclude = "Nerdbank.GitVersioning.ManagedGit.GitRepository";
 
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