Bump Microsoft.AspNetCore.Http from 2.1.1 to 2.1.22 in /src/RateLimiting

Bumps [Microsoft.AspNetCore.Http](https://github.com/aspnet/AspNetCore) from 2.1.1 to 2.1.22.
- [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...v2.1.22)

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

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

src/RateLimiting/RateLimiting.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.1.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.1.22" />
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="2.1.2" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="2.1.1" />
     <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.1" />