build(deps): bump actions/download-artifact from 4 to 5

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](https://github.com/actions/download-artifact/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

.github/workflows/main.yml

@@ -140,7 +140,7 @@ jobs:
       cancel-in-progress: ${{ needs.ci-config.outputs.skip_concurrent == 'yes' }}
     steps:
     - name: download tracked files and build artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v5
       with:
         name: windows-artifacts
         path: ${{github.workspace}}
@@ -226,7 +226,7 @@ jobs:
     steps:
     - uses: git-for-windows/setup-git-for-windows-sdk@v1
     - name: download tracked files and build artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v5
       with:
         name: vs-artifacts
         path: ${{github.workspace}}
@@ -292,7 +292,7 @@ jobs:
       shell: pwsh
       run: pip install meson ninja
     - name: Download build artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v5
       with:
         name: windows-meson-artifacts
         path: build