meson: fix pkg-config file version

It was set to 1.0 instead of 0.1.0.

Signed-off-by: Simon Ser <contact@emersion.fr>
5 jobs for pkg-config-version in 1 minute (queued for 11 seconds)
Status Name Job ID Coverage
  Sanity Check
passed check-ci-script #15098817

00:00:12

passed check-commit #15098818

00:00:14

passed check-merge-request #15098819

00:00:14

 
  Prep
passed prep-fedora-34 #15098820

00:00:26

 
  Build
passed build-fedora-34 #15098821

00:00:18