build(deps): bump actions/download-artifact from 4 to 8

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4...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>

.github/workflows/build.yml

@@ -144,7 +144,7 @@ jobs:
     steps:
 
       - name: Download Source Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: source-bundle
           path: .
@@ -211,7 +211,7 @@ jobs:
         boards: ${{ fromJSON(needs.macOS-Arch.outputs.selected_builds) }}
     steps:
       - name: Download Source Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: source-bundle
           path: .
@@ -304,7 +304,7 @@ jobs:
       - run: git config --global core.autocrlf false
 
       - name: Download Source Artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: source-bundle
           path: .