Add comment explaining what Vector2Limit does

src/raymath.h

@@ -393,6 +393,7 @@ RMAPI Vector2 Vector2Normalize(Vector2 v)
     return result;
 }
 
+// Limit vector's length to the limit value
 RMAPI Vector2 Vector2Limit(Vector2 v, float limit) {
     Vector2 result = {v.x, x.y};
     float length = sqrtf((v.x * v.x) + (v.y * v.y))