updated ansible.cfg to guide stray link devel link (#75782)

* updated ansible.cfg to guide stray link devel link

examples/ansible.cfg

@@ -1,5 +1,11 @@
+# Since Ansible 2.12 (core):
 # To generate an example config file (a "disabled" one with all default settings, commented out):
 #               $ ansible-config init --disabled > ansible.cfg
-
+#
 # Also you can now have a more complete file by including existing plugins:
 # ansible-config init --disabled -t all > ansible.cfg
+
+# For previous versions of Ansible you can check for examples in the 'stable' branches of each version
+# Note that this file was always incomplete  and lagging changes to configuration settings
+
+# for example, for 2.9: https://github.com/ansible/ansible/blob/stable-2.9/examples/ansible.cfg