Update to upload-artifact@v4 (#2126)

Author: joannaquu

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
           echo "TestResultsMac.xcresult not found."
         fi
     - name: Upload TestResultsMac.zip
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: xctest-resultsMac
         path: TestResultsMac.zip
@@ -66,7 +66,7 @@ jobs:
           echo "TestResultsiOS.xcresult not found."
         fi
     - name: Upload TestResultsiOS.zip
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: xctest-resultsiOS
         path: TestResultsiOS.zip