Win_copy: doc fix when using become (ansible#57690)

* win_copy: doc update

* Community review

lib/ansible/modules/windows/win_copy.py

@@ -91,8 +91,8 @@
       end with "/", the directory itself with all contents is copied.
     - If path is a file and dest ends with "\", the file is copied to the
       folder with the same filename.
+    - Required unless using C(content).
     type: path
-    required: yes
 notes:
 - Currently win_copy does not support copying symbolic links from both local to
   remote and remote to remote.
@@ -164,7 +164,8 @@
     ansible_become_password: pass
     # The tmp dir must be set when using win_copy as another user
     # This ensures the become user will have permissions for the operation
-    ansible_remote_tmp: '%temp%'
+    # Make sure to specify a folder both the ansible_user and the become_user have access to (i.e not %TEMP% which is user specific and requires Admin)
+    ansible_remote_tmp: 'c:\tmp'
 '''
 
 RETURN = r'''