Merge pull request #92 from knok/ubuntu-20-04

use ubuntu 20.04

Author: fkubota

Diff for: .github/workflows/cron.yml

@@ -12,7 +12,7 @@ on:
 
 jobs:
   ci:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2