Update profiling.md

Author: Mario Macias

docs/profiling.md

@@ -44,11 +44,11 @@
 Example:
 
 ```
-curl "http://localhost:6060/debug/pprof/trace?duration=20" -o trace20s
+curl "http://localhost:6060/debug/pprof/trace?seconds=20" -o trace20s
 curl "http://localhost:6060/debug/pprof/profile?duration=20" -o profile20s
 curl "http://localhost:6060/debug/pprof/heap?gc" -o heap
 curl "http://localhost:6060/debug/pprof/allocs" -o allocs
 curl "http://localhost:6060/debug/pprof/goroutine" -o goroutine
 ```
 
-4. Use `go tool pprof` to dig into the profiles (`go tool trace` for the `trace` profile)
+4. Use `go tool pprof` to dig into the profiles (`go tool trace` for the `trace` profile)