chore(deps): bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/build-exe-for-python-sdk.yml

@@ -106,7 +106,7 @@ jobs:
           --package sdk
           --output-dir dist-python
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: deepseek_harness-${{ needs.plan.outputs.version }}-py3-none-any.whl
           path: dist-python/deepseek_harness-${{ needs.plan.outputs.version }}-py3-none-any.whl
@@ -237,7 +237,7 @@ jobs:
             /tmp/dsh-sdk/bin/python /work/scripts/smoke-python-runtime.py --scenario sdk-default
           '
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: ${{ steps.runtime.outputs.wheel }}
           path: dist-python/${{ steps.runtime.outputs.wheel }}

.github/workflows/ci.yml

@@ -96,7 +96,7 @@ jobs:
           tar -czf "$RUNNER_TEMP/node-24-built-tree.tar.gz"
           apps/*/lib packages/*/*/lib vendor/*/lib
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: node-24-built-tree
           path: ${{ runner.temp }}/node-24-built-tree.tar.gz