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] <[email protected]>

.github/workflows/ci.yml

@@ -93,7 +93,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: ${{ env.NUGET_PACKAGES_ARTIFACT }}
           path: ${{ env.NUGET_DIRECTORY }}
@@ -114,7 +114,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [ validate-nuget, run-test, validate_template, validate-docs ]
     steps:
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: ${{ env.NUGET_PACKAGES_ARTIFACT }}
           path: ${{ env.NUGET_DIRECTORY }}
@@ -175,7 +175,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v4
 
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         with:
           name: ${{ env.NUGET_PACKAGES_ARTIFACT }}
           path: ${{ env.NUGET_DIRECTORY }}