Fix CI

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

.github/workflows/ci.yml

@@ -18,4 +18,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - run: sudo snap install jsonschema
+      - uses: actions/checkout@v4
       - run: make