Update eslint monorepo to v9.39.4 (#616) #1306

Job	Run time
Build RTC wheels (x86_64 arm64)	58s
Build RTC wheels (aarch64)	1m 17s
Build RTC wheels (x86_64)	49s
Make RTC sdist	17s
Build RTC wheels (AMD64)	1m 6s
Generating protobuf	0s
Test (ubuntu-latest, Python 3.14) / Test (ubuntu-latest, Python 3.14)	37s
Test (ubuntu-latest, Python 3.12) / Test (ubuntu-latest, Python 3.12)	29s
Test (macos-latest, Python 3.12) / Test (macos-latest, Python 3.12)	40s
Test (macos-latest, Python 3.9) / Test (macos-latest, Python 3.9)	56s
Test (ubuntu-latest, Python 3.13) / Test (ubuntu-latest, Python 3.13)	32s
Test (ubuntu-latest, Python 3.11) / Test (ubuntu-latest, Python 3.11)	24s
Test (windows-latest, Python 3.9) / Test (windows-latest, Python 3.9)	1m 50s
Test (windows-latest, Python 3.14) / Test (windows-latest, Python 3.14)	1m 21s
Test (macos-latest, Python 3.14) / Test (macos-latest, Python 3.14)	47s
Test (ubuntu-latest, Python 3.9) / Test (ubuntu-latest, Python 3.9)	47s
Test (ubuntu-latest, Python 3.10) / Test (ubuntu-latest, Python 3.10)	24s
Test (windows-latest, Python 3.12) / Test (windows-latest, Python 3.12)	59s
Publish RTC release	0s
docs	0s
	14m 13s

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