Replace deprecated argument for codecov action

Author: Flamefire

.github/workflows/ci.yml

@@ -326,7 +326,7 @@ jobs:
         uses: codecov/codecov-action@v5
         with:
           disable_search: true
-          file: __out/cobertura.xml
+          files: __out/cobertura.xml
           name: Github Actions
           token: ${{secrets.CODECOV_TOKEN}}
           verbose: true