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] <support@github.com>

.github/workflows/coverage.yml

@@ -57,7 +57,7 @@ jobs:
             go.mod
             go.sum
             Makefile
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-${{ matrix.part }}"
         if: env.GIT_DIFF
@@ -82,27 +82,27 @@ jobs:
             go.mod
             go.sum
             Makefile
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-00-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-01-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-02-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-03-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-04-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-05-coverage"
         if: env.GIT_DIFF