message: Update solution.cpp
  Added proper indentation
diff: @@ -22,7 +22,7 @@ LOGIC:
  ==========================================================================================
  Time Complexity: O(n), where n - number of input intervals.
  -Space complexity: O(1), no additional variables are used except for the output vector
  +Space complexity: O(1), no additional variables are used except for the output vector,
  which will not considered as it has to be returned.
  ==========================================================================================
  