[html2] curl example always shows 'apiKey' header parameter.

[adonishi]

[html2] [htmlDoc2]
see #3560

[wing328]

@adonishi thanks for the contribution :)

cc @jhitchcock

[wing328]

@adonishi Thanks for the contribution. For your upcoming PRs, I would recommend creating a new branch (e.g. git checkout -b fix_abc)

[adonishi]

alright, use new branch in next.
by the way html2 is awesome!

[ghost]

Ah good spot @adonishi I had left something custom in there, Thanks for the update! :)

I think we can also remove apiSecret, I'll do that in my next PR