Removed Python 3.6 and 3.7

Author: dylannguyen11195

.github/workflows/ci.yaml

@@ -10,10 +10,11 @@ jobs:
     strategy:
       matrix:
         include:
-          - python-version: 3.6
-            os: ubuntu-20.04
-          - python-version: 3.7
-            os: ubuntu-20.04
+          # Ubuntu 20.04 is no longer supported by GitHub Actions
+          # - python-version: 3.6 
+          #   os: ubuntu-20.04
+          # - python-version: 3.7
+          #   os: ubuntu-20.04
           - python-version: 3.8
             os: ubuntu-22.04