install pandoc to build docs

.github/workflows/deploy_doc.yml

@@ -45,6 +45,7 @@ jobs:
           maturin develop --release
           # - Install dependencies needed to build docs
           pip install -r requirements-doc.txt
+          sudo apt-get install pandoc
           # - Build the doc: once done, it is in docs/_build/html/
           cd ./docs
           make doctest

.github/workflows/test.yml

@@ -23,7 +23,7 @@ jobs:
     # We are now in CentOS 7 64 bits
     steps:
      - name: "Checkout the full project"
-       uses: actions/checkout@v4
+       uses: actions/checkout@v3
      # We need to install rust in the docker image (else, cargo is already available in github action)
      - name: "Install Rust"
        run: |
@@ -44,6 +44,7 @@ jobs:
            maturin build --release --compatibility manylinux2014
            maturin develop --release
            pip install -r requirements-dev.txt
+           sudo apt-get install pandoc
            python -m pytest python/cdshealpix/tests/test_nested_healpix.py
            python -m pytest python/cdshealpix/tests/test_ring_healpix.py
            deactivate