Update upload artifacts to latest version

GitHub deprecated v2 of upload artifacts. More here:
https://github.blog/changelog/2024-02-13-deprecation-notice-v1-and-v2-of-the-artifact-actions/

Author: Jason A. Crome

.github/workflows/ci.yml

@@ -71,7 +71,7 @@ jobs:
 
       - name: Archive artifacts
         if: ${{ matrix.perl-version == 'latest' }}
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: the-dancer
           path: |