fix

cheatsheets/python/builtins/data-structures/dictionary.md

@@ -10,7 +10,7 @@ Keys must be immutable so they can be hashed. e.g. `str`, `int`, `tuple`. Not a
 - [dict](https://docs.python.org/3/library/stdtypes.html#dict) in the Python docs.
 - [dictionary type checks][] for how to annotate your dict and validate usage with type checking.
 
-[dictionary type checks]: {% link cheatsheets/python/type-checks/data-structures/dictionary.html %}
+[dictionary type checks]: {% link cheatsheets/python/type-checks/data-structures/dictionary.md %}
 
 
 ## Create