Bump MSTest.TestFramework from 3.0.2 to 3.1.1

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.0.2 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@v3.0.2...v3.1.1)

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

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

KeeTrayTOTP.Tests/KeeTrayTOTP.Tests.csproj

@@ -31,7 +31,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     <PackageReference Include="Moq" Version="4.18.4" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.0.2" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.0.2" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
   </ItemGroup>