chore(deps): bump actions/upload-artifact from 4 to 7 (#2921)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v4...v7)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/opencode-plugin-ci.yml

@@ -55,7 +55,7 @@ jobs:
           cache-dependency-path: "@omniroute/opencode-plugin/package-lock.json"
       - run: npm install --no-audit --no-fund
       - run: npm run build
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: opencode-plugin-dist
           path: "@omniroute/opencode-plugin/dist"