Bump Microsoft.AspNetCore.SignalR.Client and Microsoft.Bcl.AsyncInterfaces

Bumps [Microsoft.AspNetCore.SignalR.Client](https://github.com/dotnet/aspnetcore) and [Microsoft.Bcl.AsyncInterfaces](https://github.com/dotnet/runtime). These dependencies needed to be updated together.

Updates `Microsoft.AspNetCore.SignalR.Client` from 9.0.3 to 9.0.4
- [Release notes](https://github.com/dotnet/aspnetcore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](https://github.com/dotnet/aspnetcore/compare/v9.0.3...v9.0.4)

Updates `Microsoft.Bcl.AsyncInterfaces` from 9.0.3 to 9.0.4
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](https://github.com/dotnet/runtime/compare/v9.0.3...v9.0.4)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.SignalR.Client
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.Bcl.AsyncInterfaces
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Tgstation.Server.Client/Tgstation.Server.Client.csproj

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <!-- Usage: Connecting to SignalR hubs in API -->
-    <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="9.0.3" />
+    <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="9.0.4" />
     <!-- Usage: Using target JSON serializer for API -->
     <PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.NewtonsoftJson" Version="9.0.3" />
   </ItemGroup>