Merge pull request #253 from Wenzel/ci/update_python

Ci/update python

Author: Wenzel

.github/workflows/ci.yml

@@ -223,10 +223,10 @@ jobs:
         with:
           components: clippy
 
-      - name: Set up Python 3.8 🐍
+      - name: Set up Python 3.9 🐍
         uses: actions/setup-python@v1
         with:
-          python-version: '3.8'
+          python-version: '3.9'
 
       - uses: actions/checkout@v1