Switch to http2 directive for nginx 1.25.1+
Summary:
nginx is deprecating the use of http2 parameter in listen directive.
Yet, servers under Rocky Linux 9.4 still use nginx 1.22.1.
Test Plan: Deployed on webserver-core servers
Reviewers: dereckson
Reviewed By: dereckson
Differential Revision: https://devcentral.nasqueron.org/D3367