Updating the bundled version of Pandoc

Carlos needs to run this:

• Ensure archives are upgraded

• Run AWS_PROFILE=... ./package/src/quarto-bld update-pandoc PANDOC_VERSION

• look at git diff, specifically for changes in Pandoc templates, and adjust as needed.

Manual steps

• Update schemas by inspecting their changelog for new commands, deprecation removals, etc

• Update lua-types if needed by inspecting the diff of lua-filters.md