MB-65617 Fix typo in success message

Change-Id: I9f8e65a4d3161d9c111766b5b949fb2cbdbfdea4
Reviewed-on: https://review.couchbase.org/c/couchbase-cli/+/224418
Reviewed-by: Lubo Marinski <lubo.marinski@couchbase.com>
Tested-by: Build Bot <build@couchbase.com>

Author: matthallcb

cbmgr.py

@@ -3352,7 +3352,7 @@ def _set(self, opts):
             opts.target, opts.encryption_type, opts.key, dek_rotation_interval, dek_lifetime)
         _exit_if_errors(errors)
 
-        _success(f"Set the encryptition settings for {opts.target}")
+        _success(f"Set the encryption settings for {opts.target}")
 
     def _add_edit_parse_opts(self, opts):
         if not opts.name: