reference stopwatch in profiler article

Author: SimonHeimberg

_build/redirection_map

@@ -190,6 +190,7 @@
 /cookbook/profiler/matchers /profiler/matchers
 /cookbook/profiler/profiling_data /profiler/profiling_data
 /cookbook/profiler/storage /profiler/storage
+/cookbook/profiler/stopwatch /profiler/stopwatch
 /cookbook/psr7 /components/psr7
 /cookbook/request/index /request
 /cookbook/request/load_balancer_reverse_proxy /deployment/proxies