Oppdaterer node i build/setup.

Author: sstensby

.github/workflows/build-deploy.yaml

@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           registry-url: https://npm.pkg.github.com
           cache: yarn
       - name: Install dependencies