setup-ckan: install libmono-system-componentmodel-composition

-this is a new dependency in ckan 1.36.4, and it wasn't in ckan's .deb file
-I considered instead pinning the default ckan version to 1.36.2, but it seems wise to keep up with the latest ckan version since we want to stay in sync with how users install mods

Author: JonnyOThan

.github/actions/setup-ckan/action.yml

@@ -51,6 +51,7 @@ runs:
       shell: bash
       run: |
         sudo rm -f /var/lib/man-db/auto-update # skip updating man pages, which takes a long time and makes no sense in a CI job
+        sudo apt install libmono-system-componentmodel-composition4.0-cil
         gh release download ${{ inputs.ckan-version }} --repo ${{ inputs.ckan-repo }} --pattern 'ckan*.deb' -O ckan.deb
         ${{ env.ACT && 'sudo apt update --quiet' }}
         sudo apt install --quiet --no-install-recommends --no-install-suggests ./ckan.deb  ${{ runner.debug && '--verbose-versions' }}