Fix list on mkdocs

The list didn't render properly on mkdocs (but did just fine on github).

Signed-off-by: Thibault Guittet <88336850+rh-tguittet@users.noreply.github.com>

docs/arcaflow/workflows/flow-control.md

@@ -106,9 +106,10 @@ the disabled output, which will output either the success output or the disabled
 The oneof tag is a method of creating a schema `one_of_string` type from values present in the workflow.
 
 The syntax of `!oneof` is:
+
 - Following the tag `!oneof`, create a new YAML section (map) by starting an indented new line. That section should contain two properties:
-  - discriminator: A string that specifies what the oneof discriminator should be. The discriminator specifies which option was emitted.
-  - options: A YAML section (map) that contains all options. The keys are the discriminator values, and the values should be valid expressions.
+    - discriminator: A string that specifies what the oneof discriminator should be. The discriminator specifies which option was emitted.
+    - options: A YAML section (map) that contains all options. The keys are the discriminator values, and the values should be valid expressions.
 
 Example:
 ```yaml title="workflow.yaml"