[Dotenv] Fix SYMFONY_DOTENV_PATH purpose

[alexandre-daubois]

After #19371 (comment), sorry for the misunderstanding on this feature!

I guess https://symfony.com/blog/new-in-symfony-7-1-misc-improvements-part-2#custom-env-path will also need an update.

cc @nicolas-grekas

[OskarStark]

Thank you Alexandre.

[javiereguiluz]

Now I understand this feature even less 😐

Nicolas' comment at #19371 (comment)

This var is not about changing the location of the dot env files. It's about exposing where the dotenv files are so that the apps itself can know about it.

But, how do you change the location of the .env files?

[alexandre-daubois]

You can change the location of .env files with the two solutions proposed in the "Storing Environment Variables In Other Files" section. And if you need to get, in your app, the .env files paths used by Symfony at runtime, then you can read the SYMFONY_DOTENV_PATH env var. Is it clearer to you?

[javiereguiluz]

Thanks Alex! It's clear now 👍 I've updated the blog post too.