Bump Microsoft.AspNetCore.WebSockets

Bumps [Microsoft.AspNetCore.WebSockets](https://github.com/aspnet/AspNetCore) from 2.1.1 to 2.1.7.
- [Release notes](https://github.com/aspnet/AspNetCore/releases)
- [Changelog](https://github.com/dotnet/aspnetcore/blob/main/docs/ReleasePlanning.md)
- [Commits](dotnet/aspnetcore@2.1.1...v2.1.7)

---
updated-dependencies:
- dependency-name: Microsoft.AspNetCore.WebSockets
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

src/DevelopmentInProgress.Socket.Extensions/DevelopmentInProgress.Socket.Extensions.csproj

@@ -16,7 +16,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore" Version="2.1.2" />
-    <PackageReference Include="Microsoft.AspNetCore.WebSockets" Version="2.1.1" />
+    <PackageReference Include="Microsoft.AspNetCore.WebSockets" Version="2.1.7" />
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="3.3.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>