Merge branch 'github-pandoc' into 'main'

Add pandoc to github workflow

See merge request water/computational-tools/surface-water-work/hyswap!80

.github/workflows/docs.yml

@@ -26,6 +26,7 @@ jobs:
         sudo apt-get install -y xdg-utils
         sudo apt-get install -y lynx
         sudo apt-get install -y graphviz
+        sudo apt-get install -y pandoc
         pydeps hyswap -T png --max-bacon=3 --cluster
         mv hyswap.png docs/source/reference/hyswap.png
         (cd docs && make docs)