Added references of Python solution for HackerRank Python Strings problem 'sWAP cASE' to readme file.
Added references of Python solution for HackerRank Python Strings problem 'sWAP cASE' to readme file.

shivkrthakur/HackerRankSolutions,shivkrthakur/HackerRankSolutions,shivkrthakur/HackerRankSolutions,shivkrthakur/HackerRankSolutions