chore(deps): update actions/setup-node action to v4

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -20,7 +20,7 @@ jobs:
       - run: git fetch --prune --unshallow
       - run: git config --global user.name 'Actions'
       - run: git config --global user.email '[email protected]'
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
       - run: node --version

.github/workflows/release-please.yml

@@ -19,7 +19,7 @@ jobs:
         # these if statements ensure that a publication only occurs when
         # a new release is created:
         if: ${{ steps.release.outputs.release_created }}
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: 20
           registry-url: 'https://registry.npmjs.org'