CI: simplify Python setup

Author: elacuesta

.github/workflows/checks.yml

@@ -9,29 +9,24 @@ jobs:
       fail-fast: false
       matrix:
         include:
-        - python-version: 3.8
-          env:
+        - env:
             TOXENV: bandit
-        - python-version: 3.8
-          env:
+        - env:
             TOXENV: black
-        - python-version: 3.8
-          env:
+        - env:
             TOXENV: flake8
-        - python-version: 3.8
-          env:
+        - env:
             TOXENV: typing
-        - python-version: 3.8
-          env:
+        - env:
             TOXENV: pylint
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Python ${{ matrix.python-version }}
+    - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: 3.11
 
     - name: Run check
       env: ${{ matrix.env }}

.github/workflows/publish.yml

@@ -10,10 +10,10 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Python 3
+    - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3
+        python-version: 3.11
 
     - name: Publish to PyPI
       run: |