build(deps): bump coverlet.msbuild from 3.1.1 to 3.1.2 in /src (#3174)

Bumps [coverlet.msbuild](https://github.com/coverlet-coverage/coverlet) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits)

---
updated-dependencies:
- dependency-name: coverlet.msbuild
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Directory.build.props

@@ -51,7 +51,7 @@
     <PackageReference Include="FluentAssertions" Version="6.4.0" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="5.0.0" />
     <PackageReference Include="PublicApiGenerator" Version="10.2.0" />
-    <PackageReference Include="coverlet.msbuild" Version="3.1.1" PrivateAssets="All" />
+    <PackageReference Include="coverlet.msbuild" Version="3.1.2" PrivateAssets="All" />
     <PackageReference Include="Verify.Xunit" Version="16.0.0" />
   </ItemGroup>