pnpm/action-setup ran with no version: `uses:` steps ignore
defaults.run.working-directory, so it executed at the repo root, which has no
package.json (per-app monorepo) → "No pnpm version specified". Pin version: 9
explicitly. Also drop setup-node's `cache: pnpm` — the act_runner cache server
isn't reachable from the DinD job containers, and the install is fast anyway.
Ronni Baslund