chore: Bump OpenFeature from 2.7.0 to 2.8.0 (#3715)

---
updated-dependencies:
- dependency-name: OpenFeature
  dependency-version: 2.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

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

@@ -16,7 +16,7 @@
         <PackageReference Include="NUnit3TestAdapter" Version="5.0.0" />
         <PackageReference Include="NUnit.Analyzers" Version="4.9.2" />
         <PackageReference Include="coverlet.collector" Version="6.0.4" />
-        <PackageReference Include="OpenFeature" Version="2.7.0" />
+        <PackageReference Include="OpenFeature" Version="2.8.0" />
         <PackageReference Include="OpenFeature.Contrib.GOFeatureFlag" Version="0.2.1" />
     </ItemGroup>