typo in englightenment for stealth when mounted

reported as internal#K4306: typo in englightenment for stealth when mounted

src/insight.c

@@ -1637,7 +1637,7 @@ attributes_enlightenment(
     if (Stealth) {
         you_are("stealthy", from_what(STEALTH));
     } else if (BStealth && (HStealth || EStealth)) {
-        Sprintf(buf, " steathy%s",
+        Sprintf(buf, " stealthy%s",
                 (BStealth == FROMOUTSIDE) ? " if not mounted" : "");
         enl_msg(You_, "would be", "would have been", buf, "");
     }