build(deps): bump actions/download-artifact in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

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

.github/workflows/ci.yml

@@ -523,7 +523,7 @@ jobs:
       - uses: actions/checkout@v2
 
       # download artifacts
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         id: download
         with:
           name: microvmi_deb
@@ -554,7 +554,7 @@ jobs:
       - uses: actions/checkout@v1
 
       # download artifacts
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         id: download
         with:
           # download to tmp_dir
@@ -633,7 +633,7 @@ jobs:
       - uses: actions/checkout@v2
 
       # download all wheels into a new manylinux directory
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         id: download
         with:
           name: python_wheels