message: docs: fix reference to old proposal name
diff: @@ -137,9 +137,9 @@ An app bundle can be wrapped into a governance proposal with the Python client f
  .. code-block:: bash
  - $ python -m ccf.proposal_generator deploy_js_app my-app/
  - SUCCESS | Writing proposal to ./deploy_js_app_proposal.json
  - SUCCESS | Wrote vote to ./deploy_js_app_vote_for.json
  + $ python -m ccf.proposal_generator set_js_app my-app/
  + SUCCESS | Writing proposal to ./set_js_app_proposal.json
  + SUCCESS | Wrote vote to ./set_js_app_vote_for.json
  -Once :ref:`submitted and accepted <governance/proposals:Submitting a New Proposal>`, a ``deploy_js_app`` proposal atomically (re-)deploys the complete JavaScript application.
  +Once :ref:`submitted and accepted <governance/proposals:Submitting a New Proposal>`, a ``set_js_app`` proposal atomically (re-)deploys the complete JavaScript application.
  Any existing application endpoints and JavaScript modules are removed.
  