MB-65339 Correct key creation typo

audit_usage -> audit-usage

Change-Id: If6a0136afc01a105363598a279c5901379f65fef
Reviewed-on: https://review.couchbase.org/c/couchbase-cli/+/224267
Reviewed-by: Safian Ali <safian.ali@couchbase.com>
Tested-by: Build Bot <build@couchbase.com>

Author: matthallcb

cbmgr.py

@@ -3364,7 +3364,7 @@ def _add_edit_parse_opts(self, opts):
         if opts.log_usage:
             usages.append("log-encryption")
         if opts.audit_usage:
-            usages.append("audit_usage")
+            usages.append("audit-usage")
         if opts.kek_usage:
             usages.append("KEK-encryption")
         if opts.all_bucket_usage: