CI: fix reference to take_1d()
Fix for issue noted by @lithomas1 in https://github.com/pandas-dev/pandas/pull/39731#issuecomment-777179836, which is causing the Benchmarks to fail.

- [ ] ~~closes #xxxx~~
- [ ] tests added / passed
- [ ] 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~~
