[App Config] appconfig kv import: Update the help message for ignore-match (Azure#29200)

Author: ChristineWanjau

src/azure-cli/azure/cli/command_modules/appconfig/_params.py

@@ -187,7 +187,7 @@ def load_arguments(self, _):
         c.argument('yes', help="Do not prompt for preview.")
         c.argument('skip_features', help="Import only key values and exclude all feature flags. By default, all feature flags will be imported from file or appconfig. Not applicable for appservice.", arg_type=get_three_state_flag())
         c.argument('content_type', help='Content type of all imported items.')
-        c.argument('import_mode', arg_type=get_enum_type([ImportMode.ALL, ImportMode.IGNORE_MATCH]), help='If import mode is "ignore-match", source key-values that already exist at the destination will not be overwritten. Import mode "all" writes all key-values to the destination regardless of whether they exist or not.')
+        c.argument('import_mode', arg_type=get_enum_type([ImportMode.ALL, ImportMode.IGNORE_MATCH]), help='If import mode is "ignore-match", only source key-values that do not already exist or whose value, content-type or tags are different from that of an existing key-value with the same key and label, will be written. Import mode "all" writes all key-values to the destination regardless of whether they exist or not.')
 
     with self.argument_context('appconfig kv import', arg_group='File') as c:
         c.argument('path', help='Local configuration file path. Required for file arguments.')