aria2c: add new example

[miguendes]

---

• The page has 8 or fewer examples.

• The PR is appropriately titled:
  <command name>: add page for new pages, or <command name>: <description of changes> for pages being edited.

• The page follows the contributing guidelines.

[tldr-bot]

The build for this PR has failed with the following error(s):

pages/common/aria2c.md:26: TLDR005 Example descriptions should end in a colon

Please fix the error(s) and push again.

[sbrl]

Hey - thanks for the edit, @mendesmiguel! Looks like you're having some issues with the linter. We've got the style we prefer documented over here, and a few good examples are the pages for tar, eyeD3, and ln. If you need any assistance, just ask 😺

[sbrl]

Thanks, @mendesmiguel 😺

[owenvoke]

LGTM! Thanks @mendesmiguel