Bump RNC CLI to 20.2.0 in RNTester (#57344) #75

Job	Run time
determine_mode	4s
set_hermes_version	0s
publish_bumped_packages	1m 10s
prebuild_apple_dependencies	-1s
build_android	-1s
prebuild_react_native_core	-1s
publish_react_native	0s
bump_podfile_lock	0s
create_draft_release	0s
generate_changelog	0s
post_publish	0s
	1m 11s

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