`config:` in `profiles.yml` is deprecated starting v1.8 in favor of `flags:` in `dbt_project.yml`

### Contributions

- [X] I have read the contribution docs, and understand what's expected of me.

### Link to the page on docs.getdbt.com requiring updates

Here's one example page to update (but there are surely more):
- https://docs.getdbt.com/reference/global-configs/print-output#printer-width

### What part(s) of the page would you like to see updated?

Proposed docs updates (up for discussion!):

When v1.7 is selected in the drop-down:
- Display code examples for only `config:` in `profiles.yml`

When v1.9 is selected in the drop-down:
- Display code examples for both `config:` in `profiles.yml` and `flags:` in `dbt_project.yml` (so that users can see how to convert one into the other)

When v1.9 is selected in the drop-down:
- Display code examples for only `flags:` in `dbt_project.yml`

### Additional information

_No response_