Bump MSTest.TestAdapter from 3.0.3 to 3.1.1

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 3.0.3 to 3.1.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.0.3...v3.1.1)

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

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

dotnet-core-webapp.webtests/dotnetcore-webapp.webtests.csproj

@@ -16,7 +16,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.4" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.1" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.0.3" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
     <PackageReference Include="MSTest.TestFramework" Version="3.0.2" />
     <PackageReference Include="coverlet.collector" Version="3.2.0" />
   </ItemGroup>