Update Ruby version to 2.7.5
Updating Ruby version in the .gitlab-ci.yml file and Gitpod docker file to 2.7.5 as it will become the default version.
Follow up from !2299 (comment 755641115)
Updating Ruby version in the .gitlab-ci.yml file and Gitpod docker file to 2.7.5 as it will become the default version.
Follow up from !2299 (comment 755641115)