lib: fix comment typo

PR-URL: #489
Reviewed-By: Jimmy Thomson <jithomso@microsoft.com>
Reviewed-By: Jack Horton <Jack.Horton@microsoft.com>

lib/internal/bootstrap_node.js

@@ -28,7 +28,7 @@
       // This file contains the V8-specific "%<function>" syntax for accessing
       // private functions. This is not supported on ChakraCore and causes a
       // parser failure. Inject a cache entry to prevent the file from being
-      // parsed. Return an array to mimmick behavior (required by util.inspect)
+      // parsed. Return an array to mimic behavior (required by util.inspect)
       NativeModule._cache['internal/v8'] = {
         loaded: true,
         exports: {