Update Testing-and-local-development.md (#9717)

Added some examples for referring to when generating APNs certs

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [ ] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [ ] Documented any API changes (docs/Using-Fleet/REST-API.md or
docs/Contributing/API-for-contributors.md)
- [ ] Documented any permissions changes
- [ ] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
- [ ] Added support on fleet's osquery simulator `cmd/osquery-perf` for
new osquery data ingestion features.
- [ ] Added/updated tests
- [ ] Manual QA for all new/changed functionality
  - For Orbit and Fleet Desktop changes:
- [ ] Manual QA must be performed in the three main OSs, macOS, Windows
and Linux.
- [ ] Auto-update manual QA, from released version of component to new
version (see [tools/tuf/test](../tools/tuf/test/README.md)).

docs/Contributing/Testing-and-local-development.md

@@ -499,6 +499,15 @@ Both can be generated using the command below. The email must be a company email
 
 ```
 $ fleetctl generate mdm-apple --email <email> --org <organization>
+```
+
+Using the above syntax, a command would look like this:
+```
+$ fleetctl generate mdm-apple --email it@example.com --org "Acme Co."
+```
+
+Successful output would look like this:
+```
 Sending certificate signing request (CSR) for Apple Push Notification service (APNs) to <email>...
 Generating APNs key, Simple Certificate Enrollment Protocol (SCEP) certificate, and SCEP key...