build(deps): bump actions/setup-node from 5 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 5 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v5...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/release-please.yml

@@ -37,7 +37,7 @@ jobs:
       id-token: write # to generate npm provenance statements
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: lts/*
           registry-url: 'https://registry.npmjs.org'

.github/workflows/tests.yml

@@ -30,7 +30,7 @@ jobs:
     - name: Checkout Repository
       uses: actions/checkout@v5
     - name: Use Node.js 22.x
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 22.x
     - name: Install Dependencies
@@ -45,7 +45,7 @@ jobs:
     - name: Checkout Repository
       uses: actions/checkout@v5
     - name: Use Node.js 22.x
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 22.x
     - name: Install Dependencies
@@ -63,7 +63,7 @@ jobs:
     - name: Checkout Repository
       uses: actions/checkout@v5
     - name: Use Node.js 22.x
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 22.x
     - name: Update npm
@@ -120,7 +120,7 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v5
       - name: Use Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node }}
       - name: Use Python ${{ matrix.python }}