Add a warning on the docs if you're not on the latest version

[wonko]

Is your feature request related to a problem?
I would be nice to add a banner to the docs if you're not on the latest version of the docs.

Google has a preference for linking to the 2.2 version when searching for "ingressclassparams alb" terms ...

Describe the solution you'd like
A simple warning on top of the page that you're not looking at the latest versions documentation, with a link to go to the latest version.

As an example, see the little warning on top of https://registry.terraform.io/providers/hashicorp/aws/5.35.0/docs/resources/s3_bucket.

Describe alternatives you've considered
Read source code to find out that an option I was looking for already existed :-)

[shraddhabang]

@wonko Thank you for this excellent suggestion. We will take a look into fixing this problem.