Build(deps): Bump MSTest.TestFramework from 3.7.2 to 3.7.3

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.7.2 to 3.7.3.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.7.2...v3.7.3)

---
updated-dependencies:
- dependency-name: MSTest.TestFramework
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Acrolinx.Sidebar.Tests/Acrolinx.Sidebar.Tests.csproj

@@ -83,7 +83,7 @@
     <PackageReference Include="Microsoft.Web.WebView2" Version="1.0.2957.106" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.7.3" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.7.2" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.7.3" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.0" />
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="9.0.1" />