Step 1.
Update the repo and checkout the branch we are going to merge
git fetch origin
git checkout -b mr-leave-config-2024-1-12 origin/mr-leave-config-2024-1-12
Step 2.
Merge the branch and push the changes to GitLab
git checkout main
git merge --no-ff mr-leave-config-2024-1-12
git push origin main
