Improve description

Author: felixge

README.md

@@ -3,7 +3,7 @@
 
 # gostackparse
 
-Package gostackparse parses goroutines stack trace dumps as produced by `panic()` or `runtime.Stack()` at ~300 MiB/s.
+Package gostackparse parses goroutines stack trace dumps as produced by [`panic()`](https://golang.org/pkg/builtin/#panic) or [`debug.Stack()`](https://golang.org/pkg/runtime/debug/#Stack) at ~300 MiB/s.
 
 Please refer to [Goroutine Profiling in Go](https://github.com/DataDog/go-profiler-notes/blob/main/goroutine.md#feature-matrix) for reasons why one might want to have to parse this data.