build(deps): bump actions/download-artifact from 3 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/release.yml

@@ -68,10 +68,10 @@ jobs:
       packages: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: drawbridge-aarch64-unknown-linux-musl-oci
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: drawbridge-x86_64-unknown-linux-musl-oci
     - run: skopeo copy docker-archive:./drawbridge-aarch64-unknown-linux-musl-oci containers-storage:localhost/drawbridge:aarch64
@@ -110,16 +110,16 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/') && github.event_name == 'push'
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: drawbridge-aarch64-unknown-linux-musl
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: drawbridge-aarch64-unknown-linux-musl-oci
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: drawbridge-x86_64-unknown-linux-musl
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: drawbridge-x86_64-unknown-linux-musl-oci