Some file names are different

[kaji-hiro]

I noticed minor typos in the following file names:

1. https://nextjs.org/learn/dashboard-app/fetching-data#parallel-data-fetching

now	Ideal
/app/lib/data.js	/app/lib/data.ts

2. https://nextjs.org/learn/dashboard-app/improving-accessibility#:~:text=FormSchema%20as%20follows%3A-,/app/lib/action.ts,-const%20FormSchema%20%3D

now	Ideal
/app/lib/action.ts	/app/lib/actions.ts

Can I make fix PR?

[Ahmadjajja]

Hello maintainers, Would you please assign this issue to me??

[leerob]

Thank you! Fixing.