Update datastructures/hashmap/README.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: BrianLusina

datastructures/hashmap/README.md

@@ -5,7 +5,7 @@ Design a HashMap without using any built-in hash table libraries.
 Implement the HashMap class:
 
 - HashMap() initializes the object with an empty map.
-- void `put(int key, int value)` inserts a (key, value) pair into the HashMap. If the key already exists in the map,
+- void `set(int key, int value)` inserts a (key, value) pair into the HashMap. If the key already exists in the map,
   update the corresponding value.
 - `int get(int key)` returns the value to which the specified key is mapped, or -1 if this map contains no mapping for
   the key.