try lint on 3.12 without matrix

Author: hovey

.github/workflows/ci.yml

@@ -24,19 +24,14 @@ env:
 
 jobs:
   lint:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        python-version: ["3.11"]
-
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
 
-    - name: Set up Python 3.11
+    - name: Set up Python 3.12
       uses: actions/setup-python@v5
       with:
-        python-version: "3.11"
+        python-version: "3.12"
 
     - name: Install uv
       uses: astral-sh/setup-uv@v1