Fix incorrect Dutch Translation of the word Generate

[joejoe04]

Describe the bug User from The Netherlands has notified us that the Dutch translation of the word Generate is not correct for the "Generate Missing WebP Versions" button.

We have this:

User says this translates to something along the lines of "embarrass".

I can also confirm Google Translate says the correct spelling should be "Genereer":

To Reproduce

1. Change language to Dutch
2. Trigger the "Generate Missing WebP Button" to appear in Imagify Settings page.

Expected behavior Spelling should be corrected

Additional context https://secure.helpscout.net/conversation/1682989143/305054/

Backlog Grooming (for WP Media dev team use only)

• [ ] Reproduce the problem
• [ ] Identify the root cause
• [ ] Scope a solution
• [ ] Estimate the effort