Bump actions/download-artifact in the github-actions group (matplotlib#305)

Bumps the github-actions group with 1 update: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 4.2.1 to 4.3.0
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4.2.1...v4.3.0)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 4.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -50,7 +50,7 @@ jobs:
     if: contains(github.ref, 'tags')
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/download-artifact@v4.2.1
+    - uses: actions/download-artifact@v4.3.0
       with:
         name: docs