Bump actions/upload-artifact from 5.0.0 to 6.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/330a01c490aca151604b8cf639adc76d48f6c5d4...b7c566a772e6b6bfb58ed0dc250532a479d7789f)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/run-integration-test-sequentially-postgresql.yml

@@ -84,7 +84,7 @@ jobs:
           ./gradlew --no-daemon --console=plain :oauth2-tests:test -PdbType=postgresql
       - name: Archive test results
         if: always()
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v4
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v4
         with:
           name: test-results
           retention-days: 5
@@ -95,7 +95,7 @@ jobs:
             oauth2-tests/build/reports/
       - name: Archive server logs
         if: always()
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v4
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v4
         with:
           name: server-logs
           retention-days: 5