Update the coding style for Zig (#336)

* Update the coding style for Zig

* Update array.rs

codes/zig/chapter_stack_and_queue/deque.zig

@@ -44,8 +44,8 @@ pub fn main() !void {
     std.debug.print("\n双向队列长度 size = {}", .{size});
 
     // 判断双向队列是否为空
-    var isEmpty = if (deque.len == 0) true else false;
-    std.debug.print("\n双向队列是否为空 = {}", .{isEmpty});
+    var is_empty = if (deque.len == 0) true else false;
+    std.debug.print("\n双向队列是否为空 = {}", .{is_empty});
 
     _ = try std.io.getStdIn().reader().readByte();
 }