RELEASING: update instructions to use meson instead of autotools

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Acked-by: Dylan Baker <dylan@pnwbakers.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
4 jobs for release-meson in 4 minutes and 2 seconds (queued for 15 seconds)
Status Name Job ID Coverage
  Build
passed latest-autotools #742179

00:03:52

passed latest-meson #742178

00:03:59

passed oldest-autotools #742181

00:02:56

passed oldest-meson #742180

00:02:13