snmpget: add Spanish translation

[kant]

• 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):

[sebastiaanspeck]

@Managor we should wait longer until one of the Spanish native speakers reviewed this PR. If after two weeks there still is no review from one of the CODEOWNERS, we can merge it.

[Managor]

@sebastiaanspeck I hear spanish codeowners are completely MIA so I've been merging these as soon as possible so they don't clutter the pull requests page

Speaking of which, can you check the old open pull requests. There are several waiting for a reviewer.