updated readme doc for getting cacheItem

README.md

@@ -70,9 +70,9 @@ func main() {
 	// foo can then be passed around freely as a string
 
         // Want to get the entry in the cache for an item not just the value?
-        var cahceItem Item
+        var cacheItem Item
         if x, found := c.GetCacheItem("foo"); found {
-                foo = x.(string)
+                cacheItem = x.(string)
         }
         // ..