Update Grpc.HealthCheck.csproj

Co-authored-by: James Newton-King <james@newtonking.com>

Author: thompson-tomo

src/Grpc.HealthCheck/Grpc.HealthCheck.csproj

@@ -25,7 +25,6 @@
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net462' or '$(TargetFramework)' == 'netstandard2.0'">
     <PackageReference Include="System.Threading.Channels" />
-
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net462' ">