Make the question on package enablement newbie-friendly

(cherry picked from commit 58221538)
Signed-off-by: Steffen Müthing <muething@dune-project.org>

bin/duneproject

@@ -226,7 +226,7 @@ while [ "$DATACORRECT" != "y" -a "$DATACORRECT" != "Y" ]; do
     read -p "4) Maintainer's email address? " MAINTAINER
   done
   while [ "$ENABLE_ALL" != "y" -a "$ENABLE_ALL" != "N" ]; do
-    read -p "5) Enable all found packages? (This will result in a simplified build system. Read the doc in dune-common/cmake/modules/DuneEnableAllPackages.cmake for details.) [y/N]" ENABLE_ALL
+    read -p "5) Enable all available packages? (Choose 'y' if you don't understand the question.) [y/N]" ENABLE_ALL
   done
 
   echo