Bump prometheus-net.AspNetCore from 8.2.0 to 8.2.1 in /src (#2794)

Bumps [prometheus-net.AspNetCore](https://github.com/prometheus-net/prometheus-net) from 8.2.0 to 8.2.1.
- [Release notes](https://github.com/prometheus-net/prometheus-net/releases)
- [Changelog](https://github.com/prometheus-net/prometheus-net/blob/master/History)
- [Commits](prometheus-net/prometheus-net@v8.2.0...v8.2.1)

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

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

src/IoTHub.Portal.Server/IoTHub.Portal.Server.csproj

@@ -68,7 +68,7 @@
     <PackageReference Include="MudBlazor" Version="6.11.0" />
     <PackageReference Include="NetEscapades.AspNetCore.SecurityHeaders" Version="0.21.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="prometheus-net.AspNetCore" Version="8.2.0" />
+    <PackageReference Include="prometheus-net.AspNetCore" Version="8.2.1" />
     <PackageReference Include="Quartz.Extensions.Hosting" Version="3.8.0" />
     <PackageReference Include="Quartz.Serialization.Json" Version="3.8.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />