kernel: k_poll: Clarify events parameter description

The functions k_work_poll_submit_to_queue(), k_work_poll_submit() and
k_poll() described the parameter events as an "array of pointers to
events" which is not accurate. Replaced the description with "array of
events".

This fixes #23775

Signed-off-by: Christian Taedcke <christian.taedcke@lemonbeat.com>
1 file changed