[Feature Request] Please differentiate shell environment variables from temporal env environment variables in docs

[fairlydurable]

Is your feature request related to a problem? Please describe.

The list of environment variables on https://docs.temporal.io/cli#environment-variables does not explicitly state that these are environment variables set with your shell and not temporal env.

Describe the solution you'd like

Suggested fix:

:::tip ENVIRONMENT VARIABLES

Do not confuse environment variables, set with your shell, with temporal env options.

:::