Fix doc generation warnings

Author: kjy5

docs/usage/experiment_automation.md

@@ -107,5 +107,6 @@ nav:
       - development/index.md
       - development/socketio_api.md
       - development/adding_a_manipulator.md
+      - development/jackhammer_mode.md
       - development/code_organization.md
       - Source Code Reference: reference/