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.yml

@@ -63,7 +63,7 @@ jobs:
       - name: Archive bloomberg-comdb2 repo with build artifacts
         run: 'tar -C /opt -czvf bloomberg-comdb2.tar.gz bb'
       - name: Upload built bloomberg-comdb2
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: bloomberg-comdb2
           path: ./bloomberg-comdb2.tar.gz
@@ -97,7 +97,7 @@ jobs:
           pipx run build --sdist
         '
       - name: Upload sdist
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v7
         with:
           name: python-comdb2-sdist
           path: dist/*.tar.gz