docs: clarify data fetching pattern

[leerob]

You don't fetch data with Server Actions, but mutate.

[Bruce9000]

Hi @leerob I use Server Actions for data fetching pretty liberally - this commit looks like I should not be doing this anymore if it's no longer a recommended pattern.

Should I be looking to migrate my code away from data fetching via Server Actions to future proof my code?

[leerob]

Could you share an example of what you're doing?

[Bruce9000]

Sure! I’m working on a sizeable commercial app powered by NextJS, I can’t share the actual code it’s all internal, but I’ve put together a quick approximation of the sort of code we’re doing to fetch data from Server Actions:

https://github.com/Bruce9000/server-action-data-fetching

Just concerned when I saw your commit, that maybe we are misusing Server Actions if we keep using them for data fetching, and may start to encounter more issues if it’s not recommended practice.

Thanks in advance for your time!