ci: bump pages actions to node24-compatible majors

checkout v4->v6, configure-pages v5->v6, upload-pages-artifact v3->v5,
deploy-pages v4->v5. Clears the Node.js 20 deprecation warning ahead of
the June 16 runner switch to Node 24.

Author: gahyun-git

.github/workflows/deploy.yml

@@ -18,7 +18,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: oven-sh/setup-bun@v2
         with:
@@ -31,13 +31,13 @@ jobs:
           NEXT_TELEMETRY_DISABLED: "1"
           NEXT_PUBLIC_CONTACT_API_URL: ${{ vars.NEXT_PUBLIC_CONTACT_API_URL }}
 
-      - uses: actions/configure-pages@v5
+      - uses: actions/configure-pages@v6
         with:
           enablement: true
 
       - run: touch out/.nojekyll
 
-      - uses: actions/upload-pages-artifact@v3
+      - uses: actions/upload-pages-artifact@v5
         with:
           path: out
 
@@ -49,4 +49,4 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
       - id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5