chore(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/ci.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Use Node.js 20
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20
       - name: Install dependencies

.github/workflows/codeql.yml

@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@v5
 
       - name: Set up Node.js 20
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20
 

.github/workflows/fixtures.yml

@@ -16,7 +16,7 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 20
       - name: Install dependencies

.github/workflows/nightly.yml

@@ -36,7 +36,7 @@ jobs:
           echo "automerge=$AUTOMERGE" >> "$GITHUB_OUTPUT"
       - uses: actions/checkout@v5
         if: steps.check.outputs.configured == 'true'
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         if: steps.check.outputs.configured == 'true'
         with:
           node-version: 20

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
           fetch-depth: 0
 
       - name: Use Node.js 20
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: 20