[ci] Test on node 26

Author: lpinca

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
-          node-version: 24
+          node-version: 26
       - run: npm ci
       - run: npm run lint
         if: matrix.os == 'ubuntu-latest'