Mention the version of Gateway API are supported by Linkerd (If not all)

[GTRekter]

As a reader, I want to know if Linkerd supports all versions of the Gateway API by default, so I can configure my cluster accordingly.

If it support all write a note about it. If not, then list the supported versions.

[kflynn]

Yeah, this is a good shout. Where would you think it most useful to have this information?