Update job item styling

What does this MR do and why?

Quick fix to update the stage dropdown in the GraphQL pipeline mini graph

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

before	after

How to set up and validate locally

1. Navigate to the pipeline editor and create a .gitlab-ci.yml with the following:

a_job_that_has_an_incredibly_long_name:
  script:
    - sleep 1

2. Commit the update
3. Once your pipeline is created, click on the stage dropdown in any pipeline mini graph