Address CodeRabbit comment: upgrade codecov to v5

Author: Erik Rasmussen

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
       - name: Run unit tests
         run: yarn start test
       - name: Run code coverage
-        uses: codecov/codecov-action@v2.1.0
+        uses: codecov/codecov-action@v5
 
   size:
     name: Bundle Size Check