Fix typo

SyncPrim/README.md

@@ -2,5 +2,5 @@
 
 This chapter describes synchronization primitivies in the Linux kernel.
 
-* [Introduction to spinloks](http://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-1.html) - the first part of this chapter describes implementation of spinlock mechanism in the Linux kernel.
+* [Introduction to spinlocks](http://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-1.html) - the first part of this chapter describes implementation of spinlock mechanism in the Linux kernel.
 * [Queued spinlocks](https://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-2.html) - the second part describes another type of spinlocks - queued spinlocks.