Merge pull request #26 from codecov/update-to-v4

chore(ci): upgrade to v4

Author: thomasrockhu-codecov

.github/workflows/ci.yml

@@ -15,6 +15,6 @@ jobs:
       - name: Run tests and collect coverage
         run: vendor/bin/phpunit --coverage-clover coverage.xml .
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4-beta
+        uses: codecov/codecov-action@v4
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_ORG_TOKEN }}