OO-2452 add missing i18n for sms user property

src/main/java/org/olat/user/propertyhandlers/_i18n/LocalStrings_de.properties

@@ -423,6 +423,7 @@ table.name.privateEmail=E-Mail (Privat)
 table.name.rank=Dienstgrad / Amtsbezeichnung
 table.name.region=Region
 table.name.skype=Skype ID
+table.name.smsTelMobile=SMS Nummer
 table.name.street=Strasse
 table.name.studySubject=Studienfach
 table.name.telMobile=Telefon Mobil

src/main/java/org/olat/user/propertyhandlers/_i18n/LocalStrings_en.properties

@@ -423,6 +423,7 @@ table.name.privateEmail=E-mail (private)
 table.name.rank=Service grade / employment title
 table.name.region=Region
 table.name.skype=Skype ID
+table.name.smsTelMobile=SMS number
 table.name.street=Street
 table.name.studySubject=Field of studies
 table.name.telMobile=Phone mobile