Update README.md

Author: wolgemoth

README.md

@@ -1,4 +1,4 @@
-# C++ Hashmap (1.0.3)
+# C++ Hashmap (1.0.4)
 
 ## Table of Contents
 
@@ -66,4 +66,4 @@ This header is used for [std::vector](https://en.cppreference.com/w/cpp/containe
 
 ### References
 
-- Wang, Q. (Harry) (2020). Implementing Your Own HashMap (Explanation + Code). YouTube. Available at: https://www.youtube.com/watch?v=_Q-eNqTOxlE [Accessed 2021].
+- Wang, Q. (Harry) (2020). Implementing Your Own HashMap (Explanation + Code). YouTube. Available at: https://www.youtube.com/watch?v=_Q-eNqTOxlE [Accessed 2021].