Trivial: Fix typo in common/limits.py

Change-Id: I3040cc69512df50459960f96b862de55804068ac

Author: Tang Chen

doc/source/command-objects/limits.rst

@@ -37,4 +37,4 @@ Show compute and block storage limits
 
 .. option:: --domain <domain>
 
-    Domain that owns --project (name or ID) [only valid with --absolute]
+    Domain the project belongs to (name or ID) [only valid with --absolute]

openstackclient/common/limits.py

@@ -55,8 +55,8 @@ def get_parser(self, prog_name):
         parser.add_argument(
             '--domain',
             metavar='<domain>',
-            help='Domain that owns --project (name or ID)'
-                 '  [only valid with --absolute]',
+            help='Domain the project belongs to (name or ID)'
+                 ' [only valid with --absolute]',
         )
         return parser