tctl install doc: make tctl ?

[marchmallow]

Brief description

In https://github.com/temporalio/documentation/blob/master/docs/tctl/how-to-install-tctl.md it says:

Build it locally:
Clone the [Temporal Server repo](https://github.com/temporalio/temporal).
Run make tctl.

But this does not work, see if I try make from temporal top level dir:

% make tctl
make: *** No rule to make target `tctl'.  Stop.

Your recommended content

There is a update-tctl target, not sure if that is what the doc should be changed to:

% make update-tctl
Install/update tctl...
go: downloading github.com/temporalio/tctl v1.16.2
go: downloading github.com/temporalio/tctl-kit v0.0.0-20220512165751-9c751176dd14
go: downloading go.temporal.io/server v1.16.1-0.20220520210750-d3f3a2989dd7
...