release.sh: restore changelog in release curl command

tools/release.sh

@@ -31,12 +31,12 @@ function gen_changelog()
     #echo $lastline
 
     changelog="Changes:\n"
-    #for i in `seq $firstline $lastline`
-    #do
-    #    local line=$( head -n $i ChangeLog | tail -n 1 )
-    #    changelog="$changelog$line\\n"
-    #    #echo $line
-    #done
+    for i in `seq $firstline $lastline`
+    do
+        local line=$( head -n $i ChangeLog | tail -n 1 )
+        changelog="$changelog$line\\n"
+        #echo $line
+    done
 
     changelog="$changelog\nWARNING: Download the source archive by clicking on the link __Download release__ above, please do not consider the automatic Source code links as they are missing the submodules.\nVisit the [documentation](https://solverstack.gitlabpages.inria.fr/chameleon/#quickstart-install) to see how to install Chameleon."
 }