fix name of function in first commit

src/firstCommit/addTwoNumbers_laurent.m

-function c = addTwoNumbers_myName(a, b)
-% addTwoNumbers_myName(a, b) returns the sum of a and b
+function c = addTwoNumbers_laurent(a, b)
+% addTwoNumbers_laurent(a, b) returns the sum of a and b
 
 c = a + b;
 end