codecov v4: New major version tagged prematurely

codecov/codecov-action#1089

Author: oittaa

.github/workflows/main.yml

@@ -60,6 +60,6 @@ jobs:
     - name: PHPUnit
       run: phpunit --coverage-clover coverage.xml
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v3
       with:
         flags: unittests