Update What is a Recipe documentation

Problem/Motivation

From https://www.drupal.org/docs/extending-drupal/drupal-recipes →

You can find core's recipes at /core/recipes. Custom and contributed recipes are kept above the webroot in ../recipes.

However, under Implementation tasks section of the introduction on this page https://git.drupalcode.org/project/distributions_recipes/-/blob/1.0.x/docs/recipe.md it says:

Recipes can be discovered in:
- /core/recipes - this is where core supplied recipes will be.
- /recipes - this is where custom and contrib recipes will be.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes