Bump PolySharp from 1.11.0 to 1.12.1

Bumps [PolySharp](https://github.com/Sergio0694/PolySharp) from 1.11.0 to 1.12.1.
- [Release notes](https://github.com/Sergio0694/PolySharp/releases)
- [Commits](Sergio0694/PolySharp@1.11.0...1.12.1)

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

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

Directory.Build.props

@@ -10,7 +10,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="PolySharp" Version="1.11.0">
+        <PackageReference Include="PolySharp" Version="1.12.1">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>