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/build.yml

@@ -78,7 +78,7 @@ jobs:
           echo "imagemagick_release=$(cat ./release-version)" >> $GITHUB_OUTPUT
 
       - name: Download RPMs
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ${{ matrix.nexus_classifier }}-rpm
           path: rpms/tests/
@@ -114,7 +114,7 @@ jobs:
           echo "imagemagick_release=$(cat ./release-version)" >> $GITHUB_OUTPUT
 
       - name: Download RPMs
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ${{ matrix.nexus_classifier }}-rpm
 
@@ -195,7 +195,7 @@ jobs:
           echo "imagemagick_release=$(cat ./release-version)" >> $GITHUB_OUTPUT
 
       - name: Download DEBs
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ubuntu${{ matrix.image_tag }}-deb
           path: debs/tests/
@@ -231,7 +231,7 @@ jobs:
           echo "imagemagick_release=$(cat ./release-version)" >> $GITHUB_OUTPUT
 
       - name: Download DEBs
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: ubuntu${{ matrix.image_tag }}-deb