Update ru-RU.json

[andrewkydev]

Changed it to more understandable Russian words.

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Description

Fixes #(issue)

Type of change

Please delete any options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• User interface (UI)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other
• This change requires a documentation update

Checklist

• [ ✓ ] My code follows the style guidelines of this project
• I ran ESLint and other linters for modified files
• I have performed a self-review of my own code and tested it
• I have commented my code, particularly in hard-to-understand areas
  (including JSDoc for methods)
• [ ✓ ] My changes generate no new warnings
• My code needed automated testing. I have added them (this is optional task)

Screenshots (if any)

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[chakflying]

Do not use PR for translation changes.

https://github.com/louislam/uptime-kuma/blob/master/src/lang/README.md