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

patches/patches/057_unions3.patch

@@ -1,4 +1,11 @@
-18c18
-< const Insect = union(InsectStat) {
----
-> const Insect = union(enum) {
+--- exercises/057_unions3.zig	2023-10-03 22:15:22.122241138 +0200
++++ answers/057_unions3.zig	2023-10-05 20:04:07.099434359 +0200
+@@ -15,7 +15,7 @@
+ //
+ const std = @import("std");
+ 
+-const Insect = union(InsectStat) {
++const Insect = union(enum) {
+     flowers_visited: u16,
+     still_alive: bool,
+ };