ci: run add_canonical script

Author: jchavarri

.github/workflows/deploy.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - add-canonical
     tags-ignore:
       - 'v*'
 
@@ -30,6 +31,8 @@ jobs:
         run: ODOC_SYNTAX="re" opam reinstall -y melange --with-doc
       - name: Copy melange docs in re syntax
         run: cp -r _opam/.opam-switch/build/melange.dev/_build/default/_doc/_html docs/api/re
+      - name: Run canonical script
+        run: opam exec -- dune exec add_canonical
       - name: Check Reason syntax
         run: make check-reason
       - name: Build playground