bump python version in tests (e3nn#487)

Author: mitkotak

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.10']
+        python-version: ['3.11']
         torch-version: ['2.4.0']
 
     steps: