update home page code snippet

Author: andrewrk

zig-code/index.zig

@@ -3,9 +3,9 @@ const parseInt = std.fmt.parseInt;
 
 test "parse integers" {
     const input = "123 67 89,99";
-    const ally = std.testing.allocator;
+    const gpa = std.testing.allocator;
 
-    var list = std.ArrayList(u32).init(ally);
+    var list = std.ArrayList(u32).init(gpa);
     // Ensure the list is freed at scope exit.
     // Try commenting out this line!
     defer list.deinit();