Update day07.md

Author: abyala

docs/day07.md

@@ -1,7 +1,7 @@
 # Day Seven: Handy Haversacks
 
-* [Problem statement](https://adventofcode.com/2020/day/6)
-* [Solution code](https://github.com/abyala/advent-2020-clojure/blob/master/src/advent_2020_clojure/day06.clj)
+* [Problem statement](https://adventofcode.com/2020/day/7)
+* [Solution code](https://github.com/abyala/advent-2020-clojure/blob/master/src/advent_2020_clojure/day07.clj)
 
 ---
 
@@ -147,4 +147,4 @@ parent contains.  Add them all up, and we're done!
 
 (defn part2 [input]
   (total-children (parse-ruleset input) shiny-gold))
-```
+```