adjust wording in expiry adjusted email

previously stated your account would be enabled, however the admin can
adjust expiry without re-enabling the user, so wording has been changed
to "your account may have been re-enabled.".

lang/email/en-us.json

@@ -49,7 +49,7 @@
         "name": "Expiry adjusted",
         "title": "Account expiry adjusted - Jellyfin",
         "yourExpiryWasAdjusted": "Your account's expiry date has been adjusted.",
-        "ifPreviouslyDisabled": "If your account was previously disabled, it has been re-enabled.",
+        "ifPreviouslyDisabled": "If your account was previously disabled, it may have been re-enabled.",
         "newExpiry": "Your account will now expire on {date}."
     },
     "inviteEmail": {