[Docs] Normalizing State Shape: Normalizr no longer maintained

[ridoy1234567]

What docs page needs to be fixed?

Page: https://redux.js.org/usage/structuring-reducers/normalizing-state-shape

This page is referenced in the Redux Style Guide.

What is the problem?

At the end of the article, the library Normalizr is suggested for normalizing nested data into a normalized format.

Normalizr is no longer maintained as of March 19, 2022.

What should be changed to fix the problem?

The article should describe a more modern solution to normalizing nested data, such as Redux Toolkit's createEntityAdapter.

[EskiMojo14]

While I agree that it would be good for that page to mention createEntityAdapter as an option, it's worth noting that Normalizr is both stable and has far more features than createEntityAdapter (for example, supporting relational data)