Add a more realistic API Key example

[caitlinnew]

Current Behavior

The current API Key example is simple, as seen below

Expected Behavior

A more realistic default example of an API Key and the ability to update the example itself

Example API key: k2KJBhmW5LvzleNv7JKLV1j2brjbUlxpUnV3XCXFBDTc5Dj2vKLkMAd1cAIjSg4g

[kentbulza]

Agree. I believe OpenAPI doesn't allow examples here, but would be nice to add a "x-stoplight-example" until OpenAPI supports?