Changelog: update for 2.2.0

[Gonzalo2310]

Please make sure these boxes are checked before submitting your PR, thank you!

• Make sure you follow Element's contributing guide (中文 | English | Español).
• Make sure you are merging your commits to dev branch.
• Add some descriptions and refer relative issues for you PR.

[Gonzalo2310]

First of all. Congratulations. More than 23,000 stars. They keep growing.

Second. There is a Spanish-language attribute on the menu that does not appear in English or Chinese. It's disabled.
Attached image.

Check it out, but I think I've done all the pending translations.

[Leopoldthecoder]

Ah, this is a mistake, I'll correct it. Thanks for pointing it out.

[Leopoldthecoder]

Hi, could you translate another sentence to Spanish?

Note: we use yarn to lock dependency versions, so you should install dependencies using yarn instead of npm install.

This is for people who want to contribute to Element. Thanks!

[Gonzalo2310]

Nota: Usamos yarn para bloquear versiones de dependencias, por lo que debería instalar dependencias usando yarn en lugar de npm install.

That would be in Spanish.

[Gonzalo2310]

@Leopoldthecoder
Whenever I can help, for this repository, another code, or for any other purpose just tell me.
It's a pleasure to be able to help. Always.

[Leopoldthecoder]

Appreciate it! Thanks!