update examples to match changes in updatefile.js

.verb.md

@@ -44,7 +44,7 @@ Try the following steps to get familiarized with how update works:
 - [ ] run `$ update example` to execute the default task, which will append the string `foo` to the file's contents.
 - [ ] run `$ update example:foo` to execute the `foo` task, appending the string `foo` to the file's contents
 - [ ] run `$ update example:bar` to execute the `bar` task, appending the string `bar` to the file's contents
-- [ ] run `$ update example.abc` to execute the default task on the `abc` (sub-)updater, appending the string `abc:one` to the file's contents
-- [ ] run `$ update example.abc:one` to execute the `one` task on the `abc` (sub-)updater, appending the string `abc:one` to the file's contents
+- [ ] run `$ update example.abc` to execute the default task on the `abc` (sub-)updater, appending the string `abc:default` to the file's contents
+- [ ] run `$ update example.abc:xyz` to execute the `xyz` task on the `abc` (sub-)updater, appending the string `abc:xyz` to the file's contents
 
 See [the code](updatefile.js) for more details.