deps: update nghttp2 to 1.34.0

Key new feature: RFC 8441 `:protocol` support

PR-URL: https://github.com/nodejs/node/pull/23284


Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>