Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-pypi.yml

@@ -23,7 +23,7 @@ jobs:
           CIBW_TEST_COMMAND: python -m apsw.tests -v
           APSW_HEAVY_DURATION: 2
 
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: dist-${{ matrix.os }}-${{ matrix.pyver }}
           path: ./wheelhouse/*.whl
@@ -37,7 +37,7 @@ jobs:
     - name: Create source dist
       run: python setup.py sdist --for-pypi
 
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       with:
         name: dist-source
         path: ./dist/*

.github/workflows/build-testpypi.yml

@@ -23,7 +23,7 @@ jobs:
           CIBW_TEST_COMMAND: python -m apsw.tests -v
           APSW_HEAVY_DURATION: 2
 
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: dist-${{ matrix.os }}-${{ matrix.pyver }}
           path: ./wheelhouse/*.whl
@@ -37,7 +37,7 @@ jobs:
     - name: Create source dist
       run: python setup.py sdist --for-pypi
 
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       with:
         name: dist-source
         path: ./dist/*