Include a macro that uses `return` in the "Jinja and macros" page

### 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

https://docs.getdbt.com/docs/build/jinja-macros#macros

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

An example that includes [`return`](https://docs.getdbt.com/reference/dbt-jinja-functions/return) would be helpful since it is often used within dbt macros.

### Additional information

_No response_