set desired framebuffer size to 1600x900x32

src/multiboot_header.c

@@ -7,6 +7,6 @@ struct {
     multiboot2_tag_t end_tag;
 } multiboot_header __attribute__((section(".multiboot"))) = {
     multiboot2_header_default(),
-    multiboot2_framebuffer_tag(0u, 0u, 0u),
+    multiboot2_framebuffer_tag(1600u, 900u, 32u),
     multiboot2_end_tag(),
 };