Adding autoComplete to v1 host.json docs

[brettsam]

+@mathewc to confirm the details.

Had an incident today that required autoComplete in V1 and noticed we had no docs on this. This PR added it: Azure/azure-functions-host#3179

[PRMerger18]

@brettsam : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[ktoliver]

Hi @ggailey777 - Would you review the proposed update to your article?

Thanks.

[cgillum]

Hey @brettsam is this PR still valid? You may want to consider submitting them to azure-docs-pr in the future so that you can sign off on your own PRs.

[brettsam]

Yes it's still valid. Although I'm not sure why the code diff looks weird and red for me... maybe @ggailey777 knows?

Thanks, I didn't know about azure-docs-pr. I've been clicking "edit" from the doc itself and making my changes, which got me here.

[ktoliver]

@brettsam Red in the diff view indicates a syntax error in the code. In this case, a closing curly bracket was missing; I added it and it's fixed now. 👍

I'll send you information in email about working in the azure-docs-pr aka private repository.

[brettsam]

@ktoliver -- holy cow, I didn't know that! Thanks!

[ggailey777]

Sorry for the delay in #sign-off
@brettsam we recommend that you run the SpineEdit tool in your Chrome browser, which gets to the correct repo automagically. Thanks!