ci: update GitHub Actions to use latest action versions (#242)

Signed-off-by: yoshinorin <yoshinorin.net@outlook.com>

Author: yoshinorin

.github/workflows/ci.yml

@@ -16,14 +16,14 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+        uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
         with:
           node-version: "18"
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path
         run: echo "::set-output name=dir::$(yarn cache dir)"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v5
         with:
           path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
           key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}