CI: Run on correct Python version for docs/lint/package checks.

Author: ubernostrum

.github/workflows/ci.yml

@@ -116,7 +116,7 @@ jobs:
       - run: tar xf dist/*.tar.gz --strip-components=1
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.13"
       - name: Set up test runner
         run: |
           python -VV
@@ -140,7 +140,7 @@ jobs:
       - run: tar xf dist/*.tar.gz --strip-components=1
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.13"
       - name: Set up test runner
         run: |
           python -VV
@@ -166,7 +166,7 @@ jobs:
       - run: tar xf dist/*.tar.gz --strip-components=1
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.13"
       - name: Set up test runner
         run: |
           python -VV