chore: restore final newline in kill-switch tutorial

Signed-off-by: Sylvester Kaczmarek <assistant@SylvesterKaczmarek.com>

Author: sylvesterkaczmarek

docs/tutorials/14-kill-switch-and-rate-limiting.md

@@ -1478,4 +1478,4 @@ print(f"HTTP: {http_status['agent_tokens']:.0f}/{http_status['agent_capacity']}
 
 - **Execution Sandboxing:** [Tutorial 06 — Execution Sandboxing](06-execution-sandboxing.md)
 - **Observability:** [Tutorial 13 — Observability & Distributed Tracing](13-observability-and-tracing.md)
-- **Agent Reliability:** [Tutorial 05 — Agent Reliability Engineering](05-agent-reliability.md)
+- **Agent Reliability:** [Tutorial 05 — Agent Reliability Engineering](05-agent-reliability.md)