Fix: Use severity column in CVEs alert iterators

The iterators in the new_cves_list function used by new / updated CVE
alerts now use the correct severity column.

Before the use of the incorrect column caused the alerts to fail.

src/manage_sql.c

@@ -33292,11 +33292,11 @@ new_cves_list (event_t event, const void* event_data, alert_t alert,
  count = 0;
  if (example)
  init_iterator (&rows,
- "SELECT uuid, name, cvss, description FROM cves"
+ "SELECT uuid, name, severity, description FROM cves"
  " LIMIT 4;");
  else if (event == EVENT_NEW_SECINFO)
  init_iterator (&rows,
- "SELECT uuid, name, cvss, description FROM cves"
+ "SELECT uuid, name, severity, description FROM cves"
  " WHERE creation_time"
  " > coalesce (CAST ((SELECT value FROM meta"
  " WHERE name"
@@ -33306,7 +33306,7 @@ new_cves_list (event_t event, const void* event_data, alert_t alert,
  " ORDER BY creation_time DESC;");
  else
  init_iterator (&rows,
- "SELECT uuid, name, cvss, description FROM cves"
+ "SELECT uuid, name, severity, description FROM cves"
  " WHERE modification_time"
  " > coalesce (CAST ((SELECT value FROM meta"
  " WHERE name"