_bleio: add missing break statement

Author: jepler

devices/ble_hci/common-hal/_bleio/att.c

@@ -1748,6 +1748,7 @@ void check_att_err(uint8_t err) {
             break;
         case BT_ATT_ERR_ENCRYPTION_KEY_SIZE:
             msg = translate("Encryption key size");
+            break;
         case BT_ATT_ERR_INVALID_ATTRIBUTE_LEN:
             msg = translate("Invalid attribute length");
             break;