build(deps): bump actions/download-artifact from 2 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...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/test.yml

@@ -109,7 +109,7 @@ jobs:
             **/**.go
             go.mod
             go.sum
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-${{ matrix.part }}"
         if: env.GIT_DIFF
@@ -133,19 +133,19 @@ jobs:
             **/**.go
             go.mod
             go.sum
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-00-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-01-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-02-coverage"
         if: env.GIT_DIFF
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-03-coverage"
         if: env.GIT_DIFF
@@ -187,7 +187,7 @@ jobs:
             **/**.go
             go.mod
             go.sum
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4
         with:
           name: "${{ github.sha }}-${{ matrix.part }}"
         if: env.GIT_DIFF