Revert "Bump"

This reverts commit 1b67fd7.

Author: sebastianbergmann

.github/workflows/ci.yml

@@ -103,6 +103,6 @@ jobs:
         run: vendor/bin/phpunit --coverage-clover=coverage.xml
 
       - name: Send code coverage report to Codecov.io
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}