Pontoon: Update Spanish (Mexico) (es-MX) localization of Firefox Scre…

…enshots

Localization authors:
- Roberto Alvarado <ralv888@gmail.com>

locales/es-MX/server.ftl

@@ -138,6 +138,9 @@ shotPageDMCAIncludeLink = Por favor, incluye la URL de esta captura en tu correo
 shotPageKeepFor = ¿Qué tanto esta captura debe ser mantenida?
 // Note: shotPageSelectTime is a placeholder label for the time selection dropdown.
 shotPageSelectTime = Selecciona tiempo
+// The ∞ is used to indicate that the shot won't expire. It is also used in
+// shotIndexNoExpirationSymbol. Try to use the same symbol in both strings, or
+// if no such symbol is available for a language/culture, simply leave it out.
 shotPageKeepIndefinitely = Indefinidamente
 shotPageKeepTenMinutes = 10 minutos
 shotPageKeepOneHour = 1 hora
@@ -220,6 +223,12 @@ shotIndexPagePreviousPage
     .title = Página anterior
 shotIndexPageNextPage
     .title = Página siguiente
+// This symbol is used in the lower right corner of the card for a shot on the
+// My Shots page to indicate that the shot does not expire. It should be a
+// single character (or simply nothing if no such symbol is available for a
+// language/culture).
+shotIndexNoExpirationSymbol = ∞
+    .title = Esta captura no expira
 
 
 // all metrics strings are optional for translation