:globe_with_meridians: Revised and updated ru.json

[sasetz]

Category: Internationalization

Overview Fixed and expanded Russian localization. Left out Nextcloud widget, it's a tight fit grammatically, plus I don't have a testing instance for now

Code Quality Checklist (Please complete)

• [x] All changes are backwards compatible
• [x] All lint checks and tests are passing
• [x] There are no (new) build warnings or errors
• [x] (If a new config option is added) Attribute is outlined in the schema and documented
• [x] (If a new dependency is added) Package is essential, and has been checked out for security or performance
• [x] (If significant change) Bumps version in package.json

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