Run nvchecker as scheduled CI job

.github/workflows/nvchecker.yml

@@ -0,0 +1,20 @@
+name: nvchecker
+
+on:
+  schedule:
+  - cron: "0 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  nvchecker:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install nvchecker
+      run: |
+        sudo apt-get update
+        sudo apt-get install nvchecker
+    - name: Run nvchecker
+      run: |
+        nvchecker -c nvchecker.toml | tee nvchecker.out
+        test -s nvchecker.out && exit 1