doc: add missing introduced_in metadata

richardlau · danielleadams · commit d7c8c6dcee6b · 2021-08-16T16:34:19.000-04:00
Fixes doc build warnings: ``` Failed to add alternative version links to webstreams Failed to add alternative version links to async_context ``` PR-URL: #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>
diff --git a/doc/api/async_context.md b/doc/api/async_context.md
@@ -1,5 +1,7 @@
 # Asynchronous Context Tracking
 
+<!--introduced_in=v16.4.0-->
+
 > Stability: 2 - Stable
 
 <!-- source_link=lib/async_hooks.js -->
diff --git a/doc/api/webstreams.md b/doc/api/webstreams.md
@@ -1,5 +1,7 @@
 # Web Streams API
 
+<!--introduced_in=v16.5.0-->
+
 > Stability: 1 - Experimental
 
 An implementation of the [WHATWG Streams Standard][].
