fix medium mirror link

Author: 1pkg

README.MD

@@ -10,7 +10,7 @@
 `go get -u github.com/1pkg/gotcha`
 
 [original blog post article](https://1pkg.github.io/posts/lets_trace_goroutine_allocated_memory/)  
-[medium mirror article](https://1pkg.github.io/posts/lets_trace_goroutine_allocated_memory/)
+[medium mirror article](https://1pkg.medium.com/lets-trace-goroutine-allocated-memory-hacking-go-runtime-910bf4b04ca0)
 
 ## Introduction