Fix Github Actions

Author: masataka

.github/workflows/ci.yml

@@ -1,4 +1,3 @@
-# https://github.com/denolib/setup-deno
 name: ci
 
 on: [push, pull_request]
@@ -11,11 +10,11 @@ jobs:
 
     steps:
       - name: Set up repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Deno
-        uses: denolib/setup-deno@v2
+        uses: denoland/setup-deno@v2
         with:
-          deno-version: v1.21.2
+          deno-version: v2.x
       - name: Perform Deno test
         run: |
           deno --version