Bump MessagePack in /src/Surging.Core/Surging.Core.Codec.MessagePack

Bumps [MessagePack](https://github.com/neuecc/MessagePack-CSharp) from 1.7.3.4 to 1.9.11.
- [Release notes](https://github.com/neuecc/MessagePack-CSharp/releases)
- [Commits](MessagePack-CSharp/MessagePack-CSharp@v1.7.3.4...v1.9.11)

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

Author: dependabot[bot]

src/Surging.Core/Surging.Core.Codec.MessagePack/Surging.Core.Codec.MessagePack.csproj

@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MessagePack" Version="1.7.3.4" />
+    <PackageReference Include="MessagePack" Version="1.9.11" />
   </ItemGroup>
 
   <ItemGroup>