uname: add Russian translation

[ivanbaluta]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

Note on the --nodename flag:

The original English page has two duplicate examples for the -n|--nodename flag. I believe this is a redundancy, so in this Russian translation, I have included only a single, more accurate example for this flag to improve clarity.

[tldr-bot]

Hello! I've noticed something unusual when checking this PR at commit
fe8df374fe3362e5e6676363e7363a9220dad7a9:

• The page pages.ru/common/uname.md is outdated, based on number of commands, compared to the English page.

Is this intended? If so, just ignore this comment. Otherwise, please double-check the commits.

[Managor]

Fix bot issues

[ivanbaluta]

This translation is based on the fix I proposed in PR #18500, which removes the redundant example from the English page.

[Managor]

Ah. For simple fixes I recommend doing both of those in the same PR to reduce confusion. That way the bot won't complain.

[ivanbaluta]

I'll definitely do that for similar cases in the future.