fix zig syntax errors in examples, and make it install executables correctly (#3395)

build.zig

@@ -1,7 +1,7 @@
 const std = @import("std");
 const raylib = @import("src/build.zig");
 
-// This has been tested to work with zig master branch as of commit 87de821 or May 14 2023
+// This has been tested to work with zig 0.11.0 (67709b6, Aug 4 2023)
 pub fn build(b: *std.Build) void {
     raylib.build(b);
 }