Update GitHub Actions to use latest action versions

Author: tmokmss

.github/workflows/build.yml

@@ -11,9 +11,9 @@ jobs:
   Build-and-Test-CDK:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
       - name: Use Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v6
         with:
           node-version: '22.x'
       - run: |
@@ -29,9 +29,9 @@ jobs:
   Build-and-Test-Webapp:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
       - name: Use Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v6
         with:
           node-version: '22.x'
       - run: |