rni: add Spanish translation

[kant]

Checklist

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• 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 contains at most 5 new pages.
• The PR is authored by me, or has been human-reviewed if it was created with AI or machine translation software.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

Reference issue: #

[tldr-bot]

Hello! I've noticed something unusual when checking this PR at commit
ece197985ebb1f1d5ca7ac8d4e55ddd184ec1f84:

• The page pages.es/windows/rni.md seems to be a copy of pages.es/windows/ren.md (94% matching).

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