Update ru.json

[ViktorOn]

Motivation

I am a good person who loves open projects

Change description

Improved and added translation

Reviewer checklist

• The PR has no duplicates (please search among the Pull Requests before creating one)
• PR title and description are properly filled.

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[per1234]

Hi @ViktorOn. Thanks for your pull request.

The translation work for this project is done exclusively on Transifex:

https://www.transifex.com/arduino-1/ide2/dashboard/

The files under the i18n folder in this repository are automatically generated from the data on Transifex, so any changes made directly to the files here would only be overwritten on the next sync.

For that reason, I can not accept this pull request, but please feel free to contribute any translations via Transifex. Thanks in advance.
Per