Output to stderr instead of stdout in release message script

stdout is used for actual data output which is captured by
the ci pipeline. stderr shows up properly in debug output

scripts/ci/create-release-message.sh

@@ -23,6 +23,6 @@ if [ "$changelog_excerpt" ]; then
     printf "%s" "$changelog_excerpt"
     exit 0
 else
-    echo "Could not find version in changelog: $VERSION"
+    >&2 echo "Could not find version in changelog: $VERSION"
     exit 1
 fi