Suggest ansible ad-hoc command while developing module (#70308)

If a local module has no documentation, the doc command will fail without any hints of what is wrong. Add another way to confirm the presence of a local module.
* Update docs/docsite/rst/dev_guide/developing_locally.rst

Co-authored-by: Abhijeet Kasurde <akasurde@redhat.com>

docs/docsite/rst/dev_guide/developing_locally.rst

@@ -43,6 +43,10 @@ Once you save your module file in one of these locations, Ansible will load it a
 
 To confirm that ``my_custom_module`` is available:
 
+* type ``ansible localhost -m my_custom_module``. You should see the output for that module.
+
+or 
+
 * type ``ansible-doc -t module my_custom_module``. You should see the documentation for that module.
 
 .. note::