[Docs]: Advanced.rst typo + hyperlink

[aj2s]

Change Type

Cleanup (formatting, typos, etc.)

Area

Functionality/features

Proposed Changes

Fix the improperly formatted hyperlink at the bottom for Module Default Groups https://netbox-ansible-collection.readthedocs.io/en/stable/getting_started/how-to-use/advanced.html#:~:text=Module%20defaults%20groups,-%5D%28https.

It seems the author reasonably expected markdown syntax to work.