Bump actions/upload-artifact from 6 to 7 (#237)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/nightly-release.yml

@@ -47,7 +47,7 @@ jobs:
           -X 'github.com/prometheus/common/version.Branch=${{ steps.gitversion.outputs.BranchName }}'
           -X 'github.com/prometheus/common/version.BuildDate=$( date '+%F %H-%M-%S' )'"
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: docker_service_exporter.${{ steps.gitversion.outputs.FullSemVer }}
           path: src/docker_service_exporter