Merge branch 'update-cs-major-version-in-cs-template' into 'master'

Bump CS_MAJOR_VERSION from 1 to 2

See merge request gitlab-org/gitlab!20986

lib/gitlab/ci/templates/Security/Container-Scanning.gitlab-ci.yml

 # Read more about this feature here: https://docs.gitlab.com/ee/user/application_security/container_scanning/
 
 variables:
-  CS_MAJOR_VERSION: 1
+  CS_MAJOR_VERSION: 2
 
 container_scanning:
   stage: test