Forgot to update include after renaming a file

build.bat

@@ -1,2 +1,2 @@
-gcc example.c  io2.c -o example  -Wall -Wextra -ggdb -lws2_32
-gcc example2.c io2.c -o example2 -Wall -Wextra -ggdb -lws2_32
+gcc example.c  io.c -o example  -Wall -Wextra -ggdb -lws2_32
+gcc example2.c io.c -o example2 -Wall -Wextra -ggdb -lws2_32

example2.c

@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include <assert.h>
-#include "io2.h"
+#include "io.h"
 
 #define MAX_RES 100
 #define MAX_OPS 100