ci: bump checkout/setup-node to v5

Clears the Node 20 runner deprecation; these majors run on Node 24.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: pratiksahu

.github/workflows/ci.yml

@@ -13,9 +13,9 @@ jobs:
       matrix:
         node-version: [18, 20, 22]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}
           cache: npm

.github/workflows/release.yml

@@ -26,9 +26,9 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 20
           registry-url: "https://registry.npmjs.org"