Mark pandoc as broken due to ghc/ghc#18018

fc4422fa · Ryan Scott · 8f3af33e · fc4422fa
Commit fc4422fa authored 5 years ago by Ryan Scott
--- a/ci/config.sh
+++ b/ci/config.sh
@@ -60,6 +60,7 @@ echo "Found GHC $version."
 case $version in
  8.11.*)
    #       package             ticket
+    broken "pandoc"             18018
    broken "singletons"         17923
    ;;