Fix indentation of the Telepath Adapter example code

[dkirkham]

Fixes the indentation of the example Telepath Adapter code, in Docs->Reference->Streamfield->Form widget client-side API.

Please check the following:

• Do the tests still pass?¹
• Does the code comply with the style guide?
  • Run make lint from the Wagtail root.
• For Python changes: Have you added tests to cover the new/fixed behaviour?
• For front-end changes: Did you test on all of Wagtail’s supported environments?²
  • Please list the exact browser and operating system versions you tested:
  • Please list which assistive technologies ³ you tested:
• For new features: Has the documentation been updated accordingly?

Please describe additional details for testing this change.

• Build docs
• Check Docs->Reference->Streamfield->Form widget client-side API

Footnotes

1. Development Testing ↩

2. Browser and device support ↩

3. Accessibility Target ↩

[squash-labs]

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Test this branch here: https://dkirkhamfix-indent-streamfield-kvga3.squash.io

[gasman]

Thanks @dkirkham! Merged (with some additional fixups to keep it at a consistent 4-space indent) in 2204dd0.

[dkirkham]

No probs, thanks Matt.
I'll keep an eye on the spaces setting in VSCode... something quietly changed that while I wasn't looking.