Fix the typo in the example comment for the fetch options.cache section. (#70364)
### What?
Fixed a typo in the example comment for the [fetch
options.cache](https://nextjs.org/docs/app/building-your-application/caching#fetch-optionscache)
section.
### Why?
The typo could lead to confusion, and correcting it ensures that the
example is clear and professional.
### How?
Updated the comment with the correct wording to reflect the intended
message without changing the functionality of the example.
Co-authored-by: JJ Kasper <jj@jjsweb.site>