Make syntax highlighting explicit in docs

src/ifcopenshell-python/ifcopenshell/api/sequence/remove_work_plan.py

@@ -31,7 +31,9 @@ class Usecase:
         :return: None
         :rtype: None
 
-        Example::
+        Example:
+
+        .. code:: python
 
             # This will hold all our construction schedules
             work_plan = ifcopenshell.api.run("sequence.add_work_plan", model, name="Construction")