chore(deps): bump MSTest.TestAdapter from 3.7.1 to 3.7.3

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 3.7.1 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@v3.7.1...v3.7.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Directory.Packages.props

@@ -4,13 +4,13 @@
         <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
     </PropertyGroup>
     <ItemGroup>
-        <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="15.5.0" />
+        <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="17.12.0" />
         <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
 
         <PackageVersion Include="Stylecop.Analyzers" Version="1.1.118" />
 
         <PackageVersion Include="MSTest.TestFramework" Version="3.7.2" />
-        <PackageVersion Include="MSTest.TestAdapter" Version="3.7.1" />
+        <PackageVersion Include="MSTest.TestAdapter" Version="3.7.3" />
         <PackageVersion Include="xunit" Version="2.9.3" />
         <PackageVersion Include="xunit.runner.visualstudio" Version="3.0.1" />