chore(deps): update actions/setup-node action to v5 (#390)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           - x.x.x # safety net; don't remove
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node_version }}
       - run: npm ci

.github/workflows/npm-publish.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 22
       - run: npm ci
@@ -25,7 +25,7 @@ jobs:
       id-token: write
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 22.x
           registry-url: 'https://registry.npmjs.org'