Update Studio screenshots in the Sky getting started guide (#258)

* Update studio screenshots for latest UI

* Update alt text for studio images

Author: laurakalbag

docs/stately-sky-getting-started.mdx

@@ -43,13 +43,13 @@ After creating your machine, you’ll need to create an API key to deploy it to
 1. Use the **Deploy** button in the top right corner of the editor to open the Stately Sky options.
 2. Use the **Create API Key** button to generate an API key.
 
-![No API key created yet](..//static/assets/sky-getting-started/editor-no-api-key.png)
+![Stately Sky modal showing no API key created yet. There is a button to Create API Key.](..//static/assets/sky-getting-started/editor-no-api-key.png)
 
 3. Be sure to copy that API key and save it somewhere safe. You’ll need it later.
 
 The page should look like this:
 
-![API key created](..//static/assets/sky-getting-started/editor-api-key.png)
+![Stately Sky modal shows the API key in an input hidden behind password dots. There are options to Regenerate, Delete, Reveal, or copy the API key to the clipboard.](..//static/assets/sky-getting-started/editor-api-key.png)
 
 ## Step 3: Deploy your machine to Sky
 
@@ -61,7 +61,7 @@ Once you have generated the API key, you can deploy your machine to Sky as a wor
 
 You’ll need the workflow’s URL to reference it from the starter project.
 
-![Actor deployed](../static/assets/sky-getting-started/editor-deployed-actor.png)
+![Stately Sky modal shows the Traffic light workflow listed under Existing deploys. The workflow has its own URL with the options to Copy URL or delete alongside.](../static/assets/sky-getting-started/editor-deployed-workflow.png)
 
 ## Step 4: Add your API key to the starter project