Dev Containers: Update experimental GHC versions #4863

Job	Run time
Integration tests (macos-latest, 2024-11-05)	26m 43s
Integration tests (macos-15-intel, 2025-12-19)	41m 44s
Integration tests (ubuntu-latest, --alpine, 2025-11-05)	26m 44s
Integration tests (windows-latest, 2025-11-05)	32m 41s
Integration tests (ubuntu-24.04-arm, --alpine --stack-args --docker-stack-exe=image, 2025-11-05)	4m 18s
Create GitHub release	0s
	2h 12m 10s

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