👷 bump actions/setup-node from 6 to 7

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 6 to 7.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v6...v7)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
         with:
           ref: "${{ github.head_ref }}"
       - name: Install dependencies and Build Theme
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
       - run: npm install
       - run: npm run assets
       - name: Commit and push Chart.js changes