Bump System.ServiceModel.Primitives from 4.10.0 to 6.1.0

Bumps [System.ServiceModel.Primitives](https://github.com/dotnet/wcf) from 4.10.0 to 6.1.0.
- [Release notes](https://github.com/dotnet/wcf/releases)
- [Commits](https://github.com/dotnet/wcf/commits)

---
updated-dependencies:
- dependency-name: System.ServiceModel.Primitives
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/MsgPack.CoreWcf.SampleClient/MsgPack.CoreWcf.SampleClient.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.ServiceModel.Http" Version="6.0.0" />
-    <PackageReference Include="System.ServiceModel.Primitives" Version="6.0.0" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="6.1.0" />
   </ItemGroup>
 
   <ItemGroup>

src/MsgPack.Wcf/MsgPack.Wcf.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net35;net45;net46;netstandard1.1;netstandard1.3;netstandard2.0</TargetFrameworks>
@@ -38,7 +38,7 @@
   </PropertyGroup> 
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.1' OR '$(TargetFramework)' == 'netstandard1.3' OR '$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.ServiceModel.Primitives" Version="4.10.0" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="6.1.0" />
   </ItemGroup>
 
   <!--<ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.1'">