changed python to 3.9

Author: kshitijrajsharma

.github/workflows/config.yml

@@ -13,10 +13,10 @@ jobs:
       ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.8
+      - name: Set up Python 3
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8.10
+          python-version: 3.9.13
 
       - name: Install gdal 
         run: |