added simple test for input 6 and 8

test/kgV/test_kgV.c

@@ -0,0 +1,17 @@
+#include "unity.h"
+#include "kgV.h"
+
+void setUp(void){}
+void tearDown(void){}
+
+void test_kgV8And6(void) {
+    //arrange
+    int a = 8;
+    int b = 6;
+    int expected = 24;
+
+    //act
+    int result = kgV(a, b);
+
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}