🤖 Update upload-artifact and download-artifact

CI was getting errors because the versions we were previously using were
deprecated.  This commit updates the actions to the latest versions.

.github/workflows/test.yml

@@ -42,8 +42,11 @@ jobs:
       - name: Run rspec
         run: bundle exec rake spec
 
+      - name: List coverage files before upload
+        run: ls -la coverage
+
       - name: Upload coverage results
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4.4.0
         with:
           name: coverage-report-${{ matrix.ruby }}
           path: coverage
@@ -55,12 +58,20 @@ jobs:
     needs: rspec
 
     steps:
+      - uses: actions/checkout@v2
+
       - name: Download coverage report
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.8
         with:
           name: coverage-report-2.7
           path: coverage
 
+      - name: List files in workspace
+        run: ls -la
+
+      - name: List coverage files
+        run: ls -la coverage
+
       - name: SimpleCov Check
         uses: vigetlabs/[email protected]
         with: