TST: add read_json test with date values GH33787
- [x ] closes #33787
- [x ] tests added / passed
- [x ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry

First attempt at contributing to pandas, or any open source projects! I think all the linting tests passed, since I installed and used the pre-commit package described in the documentation and everything was either passed or skipped.

This change added a short test for GH33787, which was to make sure that read_json was able to convert lists with date values.

thanks @horaceklai 