build action ubuntu-image downgrade

Author: samipe

.github/workflows/build-deploy.yml

@@ -5,7 +5,7 @@ on:
       - master
 jobs:
   build-and-deploy:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - name: Checkout 🛎️
         uses: actions/checkout@v2.3.1