Bump actions/download-artifact from 1 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 1 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v1...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

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

.github/workflows/main.yml

@@ -86,7 +86,7 @@ jobs:
       - uses: actions/checkout@v1
 
       - name: Download Halide
-        uses: actions/download-artifact@v1
+        uses: actions/download-artifact@v4.1.7
         with:
           name: halide-install
           path: ${{github.workspace}}/3rdparty/Halide