Update zdev-generate.py

Adding "--quiet" as additional option to "lszdev" - here more for the reason of completeness and for consistency reasons.
The relevant change for solving LP#1944516 is the change in subiquity/server/controllers/zdev.py

scripts/zdev-generate.py

@@ -12,6 +12,6 @@ for row in rows:
     record = dict([k.split('=',1) for k in row])
     if record['COLUMN'] not in ('TYPE', 'ATTR:', 'ATTRPATH:'):
         desired_columns.append(record['COLUMN'].lower())
-cmd = ['lszdev','--pairs','--columns',','.join(desired_columns)]
+cmd = ['lszdev', '--quiet', '--pairs','--columns',','.join(desired_columns)]
 print(cmd)
 print(' '.join(cmd))