test: update snapshots for orchestrator prompt change

The reconcile_task fix updates the orchestrator prompt (line 213),
which changes the system prompt prefix. Update cache payload
snapshots to match the new text.

src/hooks/__snapshots__/cache-payload.snapshot.test.ts.snap

@@ -155,7 +155,7 @@ Balance: respect dependencies, avoid parallelizing what must be sequential, and
 - Continue orchestration only on non-overlapping work; otherwise briefly report what was launched and stop.
 - Before local edits or another writer task, compare against running task scopes.
 - Parallel background tasks are allowed only when their write scopes do not conflict.
-- Before final response, reconcile any terminal jobs shown in the Background Job Board.
+- Before final response, use \`reconcile_task\` to mark any terminal jobs shown in the Background Job Board as reconciled.
 - Use \`cancel_task\` only when the user asks, or when a running lane is obsolete, wrong, or conflicts with a safer replacement plan.
 - Cancellation is not rollback: if cancelling a writer, inspect and reconcile partial file changes before launching a replacement lane.