chore(ci): upgrade to codecov v4

Author: thomasrockhu-codecov

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up JDK 18
         uses: actions/setup-java@v1
         with:
@@ -15,4 +15,6 @@ jobs:
       - name: Run tests and collect coverage
         run: mvn -B test
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_ORG_TOKEN }}