msgpack.org.md: added go syntax highlighting to code snippet.
msgpack.org.md: added go syntax highlighting to code snippet.

sunvim/go,hashicorp/go-msgpack,whyrusleeping/go-codec,whyrusleeping/go-codec,methane/go-codec,sunvim/go,sunvim/go,ugorji/go,methane/go-codec,hashicorp/go-msgpack,dmcgowan/go,methane/go-codec,ugorji/go,ugorji/go,dmcgowan/go,whyrusleeping/go-codec