ci: 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/windows-msi-build.yml

@@ -399,7 +399,7 @@ jobs:
 
       - name: Upload MSI Installer
         id: upload_msi
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: MSI Installer ${{ matrix.arch }}
           path: ${{ steps.build_msi.outputs.path }}
@@ -414,7 +414,7 @@ jobs:
 
       - name: Upload MSIX Package
         id: upload_msix
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ steps.build_msix.outputs.artifact_name }}
           path: ${{ steps.build_msix.outputs.path }}