fix typo

Author: robertbrignull

lib/toolcache.js

@@ -16,7 +16,7 @@ import { Mode } from "./util";
  * That library is not safe to use outside of actions as it makes assumptions about
  * the state of the filesystem and available environment variables.
  *
- * On actions we can just delegates to the toolcache library, however outside of
+ * On actions we can just delegate to the toolcache library, however outside of
  * actions we provide our own implementation.
  */