.gitlab-ci.yml: Desupport luarocks on Leap 43.2
https://build.opensuse.org/project/show/devel:languages:lua is no longer doing builds for Leap 43.2, which has been de-supported due to the release of Leap 15.1
Closes #269 (closed)
https://build.opensuse.org/project/show/devel:languages:lua is no longer doing builds for Leap 43.2, which has been de-supported due to the release of Leap 15.1
Closes #269 (closed)