Specify node version so angular builds, revert back to ubuntu 22.04

.gitea/workflows/release-nightly.yaml

@@ -26,12 +26,15 @@ jobs:
           name: BufPiv_main
           path: src-tauri/target/release/bundle/macos/
   web-demo:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with:
           lfs: true
       - uses: oven-sh/setup-bun@v2
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
       - uses: browser-actions/setup-chrome@v1
         id: setup-chrome
         with: