update ubuntu version

Author: Li Wei

.github/workflows/ubuntu.yml

@@ -22,7 +22,7 @@ jobs:
         node-version: [16.x]
 
     # The type of runner that the job will run on
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2