doc: add missing introduced_in metadata

Fixes doc build warnings:
```
Failed to add alternative version links to webstreams
Failed to add alternative version links to async_context
```

PR-URL: https://github.com/nodejs/node/pull/39575
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
This commit is contained in:
Richard Lau 2021-07-29 08:19:09 -04:00 committed by Node.js GitHub Bot
parent 1a1793e8a9
commit 4f9fd8d244
2 changed files with 4 additions and 0 deletions

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# Asynchronous Context Tracking
<!--introduced_in=v16.4.0-->
> Stability: 2 - Stable
<!-- source_link=lib/async_hooks.js -->

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# Web Streams API
<!--introduced_in=v16.5.0-->
> Stability: 1 - Experimental
An implementation of the [WHATWG Streams Standard][].