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] <support@github.com>

.github/workflows/collection-continuous-integration.yml

@@ -100,7 +100,7 @@ jobs:
         run: >-
           python -m pip install --user '${{ matrix.ansible-version }}'
       - name: Download migrated collection artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: collection
           path: .cache/collection-tarballs

.github/workflows/connections_tests.yml

@@ -120,7 +120,7 @@ jobs:
         run: python -m pip install --user '${{ matrix.ansible-version }}'
 
       - name: Download migrated collection artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: collection
           path: .cache/collection-tarballs
@@ -210,7 +210,7 @@ jobs:
         run: python -m pip install --user '${{ matrix.ansible-version }}'
 
       - name: Download migrated collection artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: collection
           path: .cache/collection-tarballs