Update API docs to show examples to show array query params

### 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/dbt-cloud/api-v2#/operations/List%20Runs

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

With ref to Slack [thread](https://dbt-labs.slack.com/archives/C02NCQ9483C/p1722871168091499) raised by Miguel in CS, an enterprise customer raised some feedback about the [List Run API](https://docs.getdbt.com/dbt-cloud/api-v2#/operations/List%20Runs).

They mentioned they experienced some issues figuring the format to pass the values as range and suggested it would help if there were a few examples involving array query params.

Miguel mentioned, whilst the documentation says that the finished_at__range field should be an array, he thinks it may better if there are samples. He found a resolution with `finished_at__range` being `["{start_date}"`, `"{end_date}"]` like `["yyyy-mm-dd", "yyyy-mm-dd"]` or `["yyyy-mm-dd hh:mm:ss"`, `"yyyy-mm-dd hh:mm:ss"] `.

### Additional information