cpuidle: teo: Update documentation after previous changes

After previous changes, the description of the teo governor in the
documentation comment does not match the code any more, so update it
as appropriate.

Fixes: 44991439 ("cpuidle: teo: Remove recent intercepts metric")
Fixes: 26623420 ("cpuidle: teo: Gather statistics regarding whether or not to stop the tick")
Fixes: 6da8f9ba ("cpuidle: teo: Skip tick_nohz_get_sleep_length() call in some cases")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/6120335.lOV4Wx5bFT@rjwysocki.net


[ rjw: Corrected 3 typos found by Christian ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>