Bump actions/download-artifact from 7 to 8 (#59)

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

Author: dependabot[bot]

.github/workflows/CI.yml

@@ -51,7 +51,7 @@ jobs:
         run: sudo apt-get update && sudo apt-get install -y xorg-dev mesa-utils xvfb libgl1 freeglut3-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libxext-dev
       - uses: actions/checkout@v6
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'