GitLab CI: Conditionally run job steps based on file changes

I’m working with GitLab CI and I have a job template that I want to modify. Currently, my job looks like this:

Unable to recognise previous job names in gitlab pipeline

Build.yml

gitlab ci – nested stages

Gitlab ci file structure:

Gitlab CI, Merge Request Target Branch

In my pipeline, I’d like to have a job run only if the Merge Requests target branch is a certain branch, say release/1.0.0-rc or release/1.5.0-rc, etc.