build(deps): bump actions/download-artifact from 7 to 8

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -95,7 +95,7 @@ jobs:
           key: validation_files_lfs_${{ matrix.type }}
           path: validation_files.tar.zst
       - name: download timeline build
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: build_timeline
       - name: untar
@@ -141,7 +141,7 @@ jobs:
           key: validation_files_lfs_${{ matrix.type }}
           path: validation_files.tar.zst
       - name: download timeline build
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: build_timeline
       - name: untar
@@ -174,13 +174,13 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: download outfiles
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           pattern: outfiles_*
           merge-multiple: true
           path: outfiles
       - name: download timeline build
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: build_timeline
       - name: untar