build(deps): bump dawidd6/action-download-artifact from 20 to 21

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 20 to 21.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v20...v21)

---
updated-dependencies:
- dependency-name: dawidd6/action-download-artifact
  dependency-version: '21'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/nodejs.yml

@@ -105,7 +105,7 @@ jobs:
 
     - name: Download aw-server-rust nightly
       if: ${{ matrix.aw-server == 'aw-server-rust' && matrix.aw-version == 'master' }}
-      uses: dawidd6/action-download-artifact@v20
+      uses: dawidd6/action-download-artifact@v21
       with:
         repo: ActivityWatch/aw-server-rust
         # Required, workflow file name or ID