refactoring: corrected tes function name

test/conversionOfNumbers/test_conversionOfNumbers.c

@@ -142,7 +142,7 @@ void test_convert12ToHexStrC(){
     free(result);
 }
 
-void test_binaryStringLengthOfInput256is3(){
+void test_hexStringLengthOfInput256is3(){
     //arrange
     int result;
     int expected = 3;