doc: fix typo in http2.md

sendTrilers => sendTrailers.

PR-URL: #26616
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>

doc/api/http2.md

@@ -1602,7 +1602,7 @@ default behavior is to destroy the stream.
 
 When the `options.waitForTrailers` option is set, the `'wantTrailers'` event
 will be emitted immediately after queuing the last chunk of payload data to be
-sent. The `http2stream.sendTrilers()` method can then be used to sent trailing
+sent. The `http2stream.sendTrailers()` method can then be used to sent trailing
 header fields to the peer.
 
 When `options.waitForTrailers` is set, the `Http2Stream` will not automatically