fix casing

client/coral-plugin-commentbox/translations.json

@@ -3,7 +3,7 @@
     "post": "Post",
     "cancel": "Cancel",
     "reply": "Reply",
-    "comment": "Post a Comment",
+    "comment": "Post a comment",
     "name": "Name",
     "comment-post-notif": "Your comment has been posted.",
     "comment-post-notif-premod": "Thank you for posting. Our moderation team will review your comment shortly.",
@@ -14,7 +14,7 @@
     "post": "Publicar",
     "cancel": "Cancelar",
     "reply": "Responder",
-    "comment": "Publicar un Comentario",
+    "comment": "Publicar un comentario",
     "name": "Nombre",
     "comment-post-notif": "Tu comentario ha sido publicado.",
     "comment-post-notif-premod": "Gracias por el comentario. Nuestro equipo de moderación va a revisarlo muy pronto.",