chore(deps): update dependency https://deno.land/std to v0.220.0

| datasource | package               | from    | to      |
| ---------- | --------------------- | ------- | ------- |
| deno       | https://deno.land/std | 0.219.0 | 0.220.0 |

main.ts

@@ -1,4 +1,4 @@
-import "https://deno.land/std@0.219.0/dotenv/load.ts";
+import "https://deno.land/std@0.220.0/dotenv/load.ts";
 import { decode } from "https://deno.land/x/[email protected]/mod.ts";
 import { logger } from "https://deno.land/x/[email protected]/middleware.ts";
 import { Hono } from "https://deno.land/x/[email protected]/mod.ts";