Fix tools/ path in list-screenshots.sh skill script

Author: cderv

.claude/skills/screenshot/scripts/list-screenshots.sh

@@ -3,4 +3,4 @@ set -euo pipefail
 # List all registered screenshots from the manifest.
 # Self-resolves repo root so it works regardless of CWD.
 REPO_ROOT="$(git rev-parse --show-toplevel)" || { echo "Error: not in a git repository" >&2; exit 1; }
-node "$REPO_ROOT/tools/screenshots/scripts/list.js"
+node "$REPO_ROOT/_tools/screenshots/scripts/list.js"