language entry for infractions that never expire

src/localization/en_gb/general/en_gb_moderation.lang

@@ -36,6 +36,9 @@ Failed to {infraction} {targetType} {target} because {reason}.
 [INFRACTION_DESCRIPTIONPOINTS]
 **Points:** {points} (expires {expires}) | **Total Points**: {total}
 
+[INFRACTION_NO_EXPIRATION]
+never
+
 [INFRACTION_DESCRIPTIONDURATION]
 **Duration:** {duration}
 

src/structure/interfaces/Infraction.js

@@ -193,7 +193,7 @@ class Infraction {
             description += `\n${this.guild.format('INFRACTION_DESCRIPTIONPOINTS', {
                 points: this.points,
                 total: this.totalPoints,
-                expires: `<t:${Math.round(this.expiration / 1000)}:R>`
+                expires: this.expiration ? `<t:${Math.round(this.expiration / 1000)}:R>` : this.guild.format('INFRACTION_NO_EXPIRATION')
             })}`;
         }