Fix confusing explanation that pipelines are "configured in a .gitlab-ci.yml file by using YAML keywords"

The first sentence says pipelines are configured "by using YAML keywords" which is technically correct but confusing for beginners who don't know what YAML is.

Location https://docs.gitlab.com/ee/ci/pipelines/

Current Text "Pipelines are configured in a .gitlab-ci.yml file by using YAML keywords."

Suggested Fix Rewrite for clarity: "Pipelines are configured in a .gitlab-ci.yml file using YAML (a simple data format that's easy to read). The file uses special keywords like stages, jobs, and script to define what the pipeline does."

Why This Helps Beginners understand what YAML is without having to search elsewhere.

quick win quick winfirst-time contributor documentation Documentation