Default to Python 3.11, not Python 3.8

Author: hroncok

README.md

@@ -13,8 +13,8 @@ This GitHub action tests a checked-out Python project using
 - uses: fedora-python/tox-github-action
   with:
     # The tox environment to run
-    # Default: py38 (subject to change as new Python releases come out)
-    tox_env: py38
+    # Default: py311 (subject to change as new Python releases come out)
+    tox_env: py311
 ```
 
 Add the action to your workflow file, e.g. `.github/workflows/main.yml`,

action.yaml

@@ -3,7 +3,7 @@ description: Runs tests with Tox
 inputs:
   tox_env:
     required: true
-    default: 'py38'
+    default: 'py311'
     description: Tox environment to run the tests on
   dnf_install:
     required: false