changed the patch files that we can also use them with busybox for testing in Woodpecker

patches/patches/001_hello.patch

@@ -1,4 +1,10 @@
-19c19
-< fn main() void {
----
-> pub fn main() void {
+--- exercises/001_hello.zig	2023-10-03 22:15:22.122241138 +0200
++++ answers/001_hello.zig	2023-10-05 20:04:06.846096282 +0200
+@@ -16,6 +16,6 @@
+ //
+ const std = @import("std");
+ 
+-fn main() void {
++pub fn main() void {
+     std.debug.print("Hello world!\n", .{});
+ }