doc: fix duplicate "this" and "the" on http2.md

PR-URL: #24611
Reviewed-By: Ron Korving <ron@ronkorving.nl>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Denys Otrishko <shishugi@gmail.com>

Author: kawanet

doc/api/http2.md

@@ -125,7 +125,7 @@ Every `Http2Session` instance is associated with exactly one [`net.Socket`][] or
 [`tls.TLSSocket`][] when it is created. When either the `Socket` or the
 `Http2Session` are destroyed, both will be destroyed.
 
-Because the of the specific serialization and processing requirements imposed
+Because of the specific serialization and processing requirements imposed
 by the HTTP/2 protocol, it is not recommended for user code to read data from
 or write data to a `Socket` instance bound to a `Http2Session`. Doing so can
 put the HTTP/2 session into an indeterminate state causing the session and
@@ -1132,7 +1132,7 @@ added: v9.5.0
 
 * {HTTP/2 Headers Object}
 
-An object containing the outbound trailers sent for this this `HttpStream`.
+An object containing the outbound trailers sent for this `HttpStream`.
 
 #### http2stream.session
 <!-- YAML