Bump prometheus-net from 8.0.1 to 8.1.0 (#1441)

Bumps [prometheus-net](https://github.com/prometheus-net/prometheus-net) from 8.0.1 to 8.1.0.
- [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/v8.0.1...v8.1.0)

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

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

src/KubernetesClient/KubernetesClient.csproj

@@ -10,7 +10,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="prometheus-net" Version="8.0.1" />
+        <PackageReference Include="prometheus-net" Version="8.1.0" />
         <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="7.0.3" />
         <PackageReference Include="IdentityModel.OidcClient" Version="5.2.1" />
         <PackageReference Include="Fractions" Version="7.3.0" />