Bump MessagePack, Microsoft.NETFramework.ReferenceAssemblies and Syst…

…em.Memory

Bumps [MessagePack](https://github.com/MessagePack-CSharp/MessagePack-CSharp), [Microsoft.NETFramework.ReferenceAssemblies](https://github.com/Microsoft/dotnet) and System.Memory. These dependencies needed to be updated together.

Updates `MessagePack` from 3.1.2 to 3.1.3
- [Release notes](https://github.com/MessagePack-CSharp/MessagePack-CSharp/releases)
- [Commits](MessagePack-CSharp/MessagePack-CSharp@v3.1.2...v3.1.3)

Updates `Microsoft.NETFramework.ReferenceAssemblies` from 1.0.3 to 1.0.3
- [Commits](https://github.com/Microsoft/dotnet/commits)

Updates `System.Memory` from 4.5.5 to 4.5.5

---
updated-dependencies:
- dependency-name: MessagePack
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Microsoft.NETFramework.ReferenceAssemblies
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: System.Memory
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/net/KNet.Serialization.MessagePack/KNet.Serialization.MessagePack.csproj

@@ -21,7 +21,7 @@
 		<PackageReference Include="System.Memory" Version="4.5.5" />
 	</ItemGroup>
 	<ItemGroup>
-	  <PackageReference Include="MessagePack" Version="3.1.2" />
+	  <PackageReference Include="MessagePack" Version="3.1.3" />
 	  <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
 	    <PrivateAssets>all</PrivateAssets>
 	    <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>