adjust format

templates/new_yaml_task/README.md

@@ -17,11 +17,16 @@ Homepage: `homepage to the benchmark's website goes here, if applicable`
 BibTeX-formatted citation goes here
 ```
 
-### Subtasks
+### Groups and Tasks
+
+#### Groups
+
+* `group_name`: `Short description`
+
+#### Tasks
 
-List or describe tasks defined in this folder, and their names here:
 * `task_name`: `1-sentence description of what this particular task does`
-* `task_name2`: .....
+* `task_name2`: ...
 
 ### Checklist