copy paste error in protocol version

[pelikhan]

Looks like a bug in the version number or variable name.

https://github.com/modelcontextprotocol/go-sdk/blob/4f197bc3b401a5c34e3fc25242b79ff893a9ee47/mcp/shared.go#L39C1-L40C1

[findleyr]

Thanks. Yes this is an error in the variable name (fortunately, not the variable value).

I'll fix.