Added a powershell example for ansible.builtin.script (#76980)

* Added a powershell example

None of the examples are of a form that actually works with powershell/windows hosts. The added last example actually works with Windows hosts and Ansible. Inspired by: https://devops.stackexchange.com/questions/15409/ansible-how-to-run-local-powershell-script-on-remote-hosts

* Trivial PEP fix

lib/ansible/modules/script.py

@@ -102,4 +102,7 @@ EXAMPLES = r'''
   ansible.builtin.script: /some/local/script.py
   args:
     executable: python3
+
+- name: Run a Powershell script on a windows host
+  script: subdirectories/under/path/with/your/playbook/script.ps1
 '''