Merge pull request #69 from Azure/hazeng/fix-python-template

Fix python template to use vmImage ubuntu-18.04

Author: Hazhzeng

FunctionApp/linux-python-functionapp-on-azure.yml

@@ -17,7 +17,7 @@ env:
 
 jobs:
   build-and-deploy:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - name: 'Checkout GitHub Action'
       uses: actions/checkout@master