Add one-dimensional matrices to version history

doc/ci/yaml/README.md

@@ -3566,9 +3566,6 @@ There can be from 2 to 50 jobs.
 Jobs can only run in parallel if there are multiple runners, or a single runner is
 [configured to run multiple jobs concurrently](#using-your-own-runners).
 
-[In GitLab 13.5](https://gitlab.com/gitlab-org/gitlab/-/issues/26362) and later,
-you can have one-dimensional matrices with a single job.
-
 Every job gets the same `CI_NODE_TOTAL` [environment variable](../variables/README.md#predefined-environment-variables) value, and a unique `CI_NODE_INDEX` value.
 
 ```yaml
@@ -3607,6 +3604,22 @@ deploystacks: [vultr, processing]
 
 The job naming style was [improved in GitLab 13.4](https://gitlab.com/gitlab-org/gitlab/-/issues/230452).
 
+##### One-dimensional `matrix` jobs
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/26362) in GitLab 13.5.
+
+You can also have one-dimensional matrices with a single job:
+
+```yaml
+deploystacks:
+  stage: deploy
+  script:
+    - bin/deploy
+  parallel:
+    matrix:
+      - PROVIDER: [aws, ovh, gcp, vultr]
+```
+
 ### `trigger`
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/8997) in [GitLab Premium](https://about.gitlab.com/pricing/) 11.8.