Update 0169-majority-element.cpp

[MarlzRana]

The prior solution had a time and space complexity in the O(n)
The proposed solution has the same time complexity in the O(n)
The proposed solution has an improved space complexity in the O(1)

• File(s) Modified: 0169-majority-element.cpp
• Language(s) Used: cpp
• Submission URL: https://leetcode.com/problems/majority-element/submissions/1083722552/

[MHamiid]

Thanks.