fix(ci): Checkout docs with Git-LFS (fixes #820). (#821)

Author: kirkrodrigues

.github/workflows/clp-docs.yaml

@@ -23,6 +23,7 @@ jobs:
     steps:
       - uses: "actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683"
         with:
+          lfs: "true"
           submodules: "recursive"
 
       - uses: "actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38"