Fix user and poster not showing in vouchers

version_bump.sh

@@ -3,6 +3,12 @@ set -euo pipefail
 parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" || exit ; pwd -P )
 cd "$parent_path" || exit
 
+last_commit_subject=$(git log -1 --format=%s)
+if [[ "$last_commit_subject" =~ ^Version\ Bump ]]; then
+  echo "Last commit is already a version bump (\"$last_commit_subject\"). Nothing to do."
+  exit 0
+fi
+
 if [ 1 -eq "$#" ]
 then
   current_version=$(grep -m 1 '^version = ' brewman/pyproject.toml | sed -E 's/version = "([^"]+)"/\1/')