Update solution.md

Changed the reference to each item of the array since it was previously defined as the variable word.

Author: spaceinvadev

1-js/05-data-types/07-map-set/02-filter-anagrams/solution.md

@@ -36,7 +36,7 @@ Letter-sorting is done by the chain of calls in the line `(*)`.
 For convenience let's split it into multiple lines:
 
 ```js
-let sorted = arr[i] // PAN
+let sorted = word // PAN
   .toLowerCase() // pan
   .split('') // ['p','a','n']
   .sort() // ['a','n','p']