Update main.yml

update action base image from 18.04 to 22.04

.github/workflows/main.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build-deploy:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v1  # v2 does not have submodules option now
 #         with: