update internationalization of user guides and moneropedia

[erciccione]

• run po4a script on user guides and moneropedia entries
• fix issues in _i18n/es/resources/user-guides/remote_node_gui.md
• removed leftovers of removed guide canonically_unique_host

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[plowsof]

thanks for fixing an error i introduced here https://github.com/monero-project/monero-site/commit/acdfda6e117b3e3e9ddf143eca4d4dbe5282868d#diff-348603a96c362170db67a77002d0dedc507955ae909ccfb0d534e7936099e64dR110 , this PR resolves it