Add note to use script module rather than inline here documents (#32863)

* Add example on how to use a here document with shell module

* Remove here doc example and add note to use script module instead

lib/ansible/modules/commands/shell.py

@@ -75,6 +75,8 @@ notes:
   -  To sanitize any variables passed to the shell module, you should use
      "{{ var | quote }}" instead of just "{{ var }}" to make sure they don't include evil things like semicolons.
   - For Windows targets, use the M(win_shell) module instead.
+  - Rather than using here documents to create multi-line scripts inside playbooks,
+    use the M(script) module instead.
 requirements: [ ]
 author:
     - Ansible Core Team