ci: use python3.10 instead of 3.8

3.8 is no longer available with the base action

Author: GG-HH

.github/workflows/main.yml

@@ -9,10 +9,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.10
 
       - name: Install dependencies
         run: |
@@ -38,10 +38,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v1
         with:
-          python-version: 3.8
+          python-version: 3.10
 
       - name: Install dependencies
         run: |