Mesa has renamed its default branch to main.
Signed-off-by: Simon McVittie <smcv@collabora.com>
# Copied from mesa, big kudos
#
-# https://gitlab.freedesktop.org/mesa/mesa/-/blob/master/.gitlab-ci/windows/mesa_container.ps1
+# https://gitlab.freedesktop.org/mesa/mesa/-/blob/main/.gitlab-ci/windows/mesa_container.ps1
# https://gitlab.freedesktop.org/mesa/mesa/-/blob/34e3e164936d1d3cef267da7780e87f062fedf39/.gitlab-ci/windows/mesa_container.ps1
# Implements the equivalent of ci-templates container-ifnot-exists, using