Bump MSTest from 3.1.1 to 3.2.0 in /src

Bumps [MSTest](https://github.com/microsoft/testfx) from 3.1.1 to 3.2.0.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.1.1...v.3.2.0)

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

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

src/Bootstrap.Tests/Bootstrap.Tests.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MSTest" Version="3.1.1" />
+    <PackageReference Include="MSTest" Version="3.2.0" />
     <PackageReference Include="SpecFlow.MsTest" Version="3.9.74" />
   </ItemGroup>