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/conformance.yml

@@ -30,7 +30,7 @@ jobs:
           timeout 30 bash -c 'until curl -s http://localhost:8080/mcp > /dev/null 2>&1; do sleep 0.5; done'
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version: '22'
 
@@ -62,7 +62,7 @@ jobs:
           timeout 30 bash -c 'until curl -s http://localhost:8081/mcp > /dev/null 2>&1; do sleep 0.5; done'
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version: '22'
 
@@ -92,7 +92,7 @@ jobs:
         run: ./mvnw clean install -DskipTests
 
       - name: Set up Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v7
         with:
           node-version: '22'