Add create deployment api call example

[lzdanski]

Issue Type

Missing content for an existing feature

Links to Affected Docs

https://www.astronomer.io/docs/astro/upgrade-runtime#run-a-deprecated-astro-runtime-version

The Issue or Context

Add an API call example for creating a deployment

Fix or Proposed Change

Add an API call example for creating a deployment with a

Additional Notes

https://astronomer.slack.com/archives/C01UA03TPV1/p1717078528296739

Required Reviewers

No response