Update CI YAML docs

doc/ci/yaml/README.md

@@ -200,9 +200,10 @@ The above specification will make sure that `job` is built by a runner that have
 ### when
 `when` is used to implement jobs that are run in case of failure or despite the failure.
-The `when` can be set to one of the following values:
-1. `on_success` - execute build only when all builds from prior stages succeeded. This is default.
-1. `on_failure` - execute build only when at least one of the build from prior stages failed.
+`when` can be set to one of the following values:
+
+1. `on_success` - execute build only when all builds from prior stages succeeded. This is the default.
+1. `on_failure` - execute build only when at least one build from prior stages failed.
 1. `always` - execute build despite the status of builds from prior stages.
 ```
@@ -250,4 +251,4 @@ Each instance of GitLab CI has an embedded debug tool called Lint.
 You can find the link to the Lint in the project's settings page or use short url `/lint`.
 ## Skipping builds
-There is one more way to skip all builds, if your commit message contains tag [ci skip]. In this case, commit will be created but builds will be skipped
\ No newline at end of file
+There is one more way to skip all builds, if your commit message contains tag [ci skip]. In this case, commit will be created but builds will be skipped