Bump actions/setup-node from 6 to 7 (#770)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 6 to 7.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docs.yml

@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@v7
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
         with:
           node-version: '26'
 

.github/workflows/go.yml

@@ -149,7 +149,7 @@ jobs:
           go-version: ${{ matrix.go }}
 
       - name: Set up Node.js 26
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
         with:
           node-version: '26'
 

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
           go-version: "1.26"
 
       - name: Set up Node.js 26
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@v7
         with:
           node-version: '26'