Pin to known working version of node for build

Author: Caligatio

.github/workflows/main.yml

@@ -9,7 +9,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
-        node-version: 'latest'
+        node-version: 21
     - uses: browser-actions/setup-chrome@v1
     - uses: browser-actions/setup-firefox@v1
     - name: Install dependencies