scripts: create-release pass -n to tail

Some versions of tail don't accept "tail +4".
diff --git a/scripts/create-release b/scripts/create-release
index 21649c9..488c0ce 100755
--- a/scripts/create-release
+++ b/scripts/create-release
@@ -156,7 +156,7 @@
   #git shortlog v$OLD.. | sed -ne 's/^      /    - /p'
   git log --oneline --reverse --format="    - %s" v$OLD..
   echo
-  tail +4 CHANGELOG
+  tail -n +4 CHANGELOG
 ) >.chglog.tmp && mv .chglog.tmp CHANGELOG
 
 echo "Updating VERSION ..."