[Xfce-i18n] New translator for a couple messages

[ArenaL5]

Hello to everyone here! I've created an account here only because there
are a couple of wrong messages in the Spanish translation of some XFCE
tools. I've been directed to use transifex instead of posting an issue
like this: https://gitlab.xfce.org/xfce/thunar/-/issues/628

By the way, I can request to join several teams for Thunar, but not
Spanish. Why is this?