Bump prometheus-net from 7.0.0 to 8.0.0 (#1206)

Bumps [prometheus-net](https://github.com/prometheus-net/prometheus-net) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/prometheus-net/prometheus-net/releases)
- [Changelog](https://github.com/prometheus-net/prometheus-net/blob/master/History)
- [Commits](https://github.com/prometheus-net/prometheus-net/compare/v7.0.0...v8.0.0)

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

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

src/KubernetesClient/KubernetesClient.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="prometheus-net" Version="7.0.0" />
+    <PackageReference Include="prometheus-net" Version="8.0.0" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.26.1" />
     <PackageReference Include="IdentityModel.OidcClient" Version="5.2.1" />
   </ItemGroup>