different syntax

Author: phschiele

.github/workflows/main.yml

@@ -14,7 +14,9 @@ jobs:
                 python-version: [3.8]
                 include:
                     - os: ubuntu-latest
-                      python-version: [3.6, 3.7]
+                      python-version: 3.6
+                    - os: ubuntu-latest
+                      python-version: 3.7
 
         steps:
             - uses: actions/checkout@v2