build: update github node version to 20.x

Author: ViktorTigerstrom

.github/workflows/build.yml

@@ -14,6 +14,6 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '14.x'
+          node-version: '20.x'
       - run: yarn install --frozen-lockfile
       - run: yarn run build