docs: Actualize "What we're working on now" in README

[AlexElin]

Documentation Feedback

Actualize "What we're working on now" section in README file. At present it is for Q4 2021.

Affected documentation page

https://github.com/angular/components/blob/main/README.md

[ferrorenan]

Hey guys, Can I get this issue and resolve it!?

[anisabboud]

Seems resolved by https://github.com/angular/components/commit/90e7f30af4b4c6c40397ffc36ee8964f66dfe8e5 🎉

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