meson: Fix another reference to "gl" 9.2.0

Previous commit e6ef2b12 missed a spot.
3 jobs for meson-glvnd-compat in 5 minutes and 51 seconds
Status Name Job ID Coverage
  Docker Image
passed debian-testing #721347

00:00:25

 
  Build And Test
passed autotools-build-and-test #721348

00:05:25

passed meson-build-and-test #721349

00:01:25