Fix a typo in ci/jobs docs

doc/ci/jobs/index.md

@@ -133,7 +133,7 @@ In the pipeline, the result is a group named `build ruby` with three jobs:
 
 ![Job group](img/job_group_v12_10.png)
 
-The jobs are be ordered by comparing the numbers from left to right. You
+The jobs are ordered by comparing the numbers from left to right. You
 usually want the first number to be the index and the second number to be the total.
 
 [This regular expression](https://gitlab.com/gitlab-org/gitlab/blob/2f3dc314f42dbd79813e6251792853bc231e69dd/app/models/commit_status.rb#L99)