add threads examples in readme

Author: steevehook

threads/README.md

@@ -6,6 +6,6 @@
 - [LockOSThread - Go](https://github.com/golang-basics/concurrency/blob/master/threads/lock-os-threads/go/main.go)
 - [LockOSThread - CGo](https://github.com/golang-basics/concurrency/blob/master/threads/lock-os-threads/cgo/main.go)
 - [LockOSThread - Benchmarks](https://github.com/golang-basics/concurrency/blob/master/threads/lock-os-threads/benchmarks/benchmarks_test.go)
-- [C Multithreading](https://github.com/golang-basics/concurrency/blob/master/threads/lock-os-threads/c-multithreading/main.c)
+- [C Multithreading](https://github.com/golang-basics/concurrency/blob/master/threads/c-multithreading/main.c)
 
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