chore(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](actions/download-artifact@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>

Author: dependabot[bot]

.github/workflows/test-harness-android.yml

@@ -31,7 +31,7 @@ jobs:
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
       - uses: actions/checkout@v7
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: ci-lockfiles
           path: .

.github/workflows/test-harness-ios.yml

@@ -25,7 +25,7 @@ jobs:
       IOS_SIMULATOR_OS: ${{ matrix.config.xcode }}
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: ci-lockfiles
           path: .

.github/workflows/test-macos.yml

@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: ci-lockfiles
           path: .

.github/workflows/update-lockfiles.yml

@@ -22,7 +22,7 @@ jobs:
       USE_FRAMEWORKS: static
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: ci-lockfiles
           path: .