pandoc: bump version to v3.6.3 (#301)

Author: cagix

docker/install-pandoc.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 ## Versions
-export PANDOC="3.6.2"
+export PANDOC="3.6.3"
 # set ARCH="amd64" or ARCH="arm64" externally
 export ARCH="${ARCH:-amd64}"  # if not set, use 'amd64' as default