fix: artifacts to use v4 since v3 upload and download artifacts were depricated by GitHub earlier this year.

Author: Khurdhula-Harshavardhan

.github/workflows/ci.yml

@@ -111,7 +111,7 @@ jobs:
       
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: test-results-${{ matrix.test-file }}
           path: report.json
@@ -123,7 +123,7 @@ jobs:
     if: always()
     steps:
       - name: Download all test results
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: test-results