ci(deps-dev): bump ruff from 0.15.19 to 0.15.20 #687

Job	Run time
flutter_e2e_test (macos-15, flutter-ios)	24m 49s
android_test (test/functional/android/appium_service_tests.py test/functional/android/chrome_test...	3m 34s
flutter_e2e_test (ubuntu-latest, flutter-android)	5m 9s
ios_test (test/functional/ios/safari_tests.py, func_test_ios1)	27m 14s
	1h 0m 46s

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