chore(deps): Bump actions/setup-node from 4 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v4...v6)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'
-    - uses: actions/setup-node@v4
+    - uses: actions/setup-node@v6
     - name: Build
       run: |
         make generate

.github/workflows/examples.yml

@@ -76,7 +76,7 @@ jobs:
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'
-    - uses: actions/setup-node@v4
+    - uses: actions/setup-node@v6
     - uses: shogo82148/actions-setup-mysql@v1
       with:
         mysql-version: "8.1"
@@ -105,7 +105,7 @@ jobs:
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'
-    - uses: actions/setup-node@v4
+    - uses: actions/setup-node@v6
     - uses: sqlc-dev/action-setup-postgres@master
       with:
         postgres-version: "16"