ci: bump actions/setup-node from 4 to 7

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4 to 7.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v4...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/ci.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
           node-version: '22'
           cache: npm
@@ -55,7 +55,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
           node-version: '22'
       # Every JS file in the package, not just the entrypoint: the server is a
@@ -147,7 +147,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
           node-version: '22'
           cache: npm