Update user module documentation to include MacOS password change behavior (#80958)

lib/ansible/modules/user.py

@@ -93,6 +93,9 @@ options:
             - To create an account with a locked/disabled password on Linux systems, set this to V('!') or V('*').
             - To create an account with a locked/disabled password on OpenBSD, set this to V('*************').
             - B(OS X/macOS:) Enter the cleartext password as the value. Be sure to take relevant security precautions.
+            - On macOS, the password specified in the C(password) option will always be set, regardless of whether the user account already exists or not.
+            - When the password is passed as an argument, the C(user) module will always return changed to C(true) for macOS systems.
+              Since macOS no longer provides access to the hashed passwords directly.
         type: str
     state:
         description: