✍ Typo: [generics/hidash] Function name copy-pasted from 03-pick

[MadPigeon]

Typo Report Checklist

• I have pulled the latest main branch of the repository.
• I have searched for related issues and pull requests and found none that matched my issue.
• I have searched the word or phrase in question online to verify it's incorrect.
• This is the appropriate issue form for the typo I would like to report.

Impacted Project File

projects/generics/hidash/04-pickmany/README.md

What's Wrong?

The files section is copy-pasted from the previous task

It is:

- `index.ts`: Write your `pick` function here
- `index.test.ts`: Tests verifying `pick`

It should be:

- `index.ts`: Write your `pickMany` function here
- `index.test.ts`: Tests verifying `pickMany`

Additional Info

No response

[JoshuaKGoldberg]

Nice spot!