chore(deps): bump codecov/codecov-action from 3 to 4 (#283)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -105,7 +105,7 @@ jobs:
           DATABASE_URL: postgres://eventually:password@localhost:5432/eventually?sslmode=disable
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           files: lcov.info