Update bubblesort.c

[CannanDashiell]

Instead of using a macro for the size of the array, the input size can be exactly equal to the user input.
As in the above code the first input is the number of elements 'n' which cannot be greater than 100 as it was defined using a macro but if create array of exact size given by user 'n' then it can be even greater than 100 (value of n can range depending upon the data type, and it wont be limited to 100). In the above code instead of creating an array of MAX (100). We can create array of n which comes as an input from user. This can improve space complexity as well.