The bot should recognize both ansible and ansible-core versions in issue template

[dmsimard]

It looks like the bot currently insists that the "ansible-core version" is called "Ansible version", which is the wrong term (the Ansible version is 4.x.0, the ansible-core version 2.11.y). I yesterday made the mistake of correcting the field's name in c.g's issue template (ansible-collections/community.general#3458) and that resulted in the bot not being happy (ansible-collections/community.general#3466 (comment)). I think we need to adjust the bot so it accepts "ansible-core version" as well, and not just "ansible version".

Originally posted by @felixfontein in #28 (comment)

[dmsimard]

Note: this is probably more upstream (https://github.com/ansible/ansibullbot) material than something specific to our fork.