chore: bump OpenFeature

Bumps [OpenFeature](https://github.com/open-feature/dotnet-sdk) from 1.6.0 to 2.0.0.
- [Release notes](https://github.com/open-feature/dotnet-sdk/releases)
- [Changelog](https://github.com/open-feature/dotnet-sdk/blob/main/CHANGELOG.md)
- [Commits](open-feature/dotnet-sdk@v1.6.0...v2.0.0)

---
updated-dependencies:
- dependency-name: OpenFeature
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

openfeature/provider_tests/dotnet-integration-tests/ProviderTests/ProviderTests.csproj

@@ -16,8 +16,8 @@
         <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
         <PackageReference Include="NUnit.Analyzers" Version="4.3.0" />
         <PackageReference Include="coverlet.collector" Version="6.0.2" />
-        <PackageReference Include="OpenFeature" Version="1.6.0" />
-        <PackageReference Include="OpenFeature.Contrib.GOFeatureFlag" Version="0.1.10" />
+        <PackageReference Include="OpenFeature" Version="2.0.0" />
+        <PackageReference Include="OpenFeature.Contrib.GOFeatureFlag" Version="0.2.0" />
     </ItemGroup>
 
 </Project>