fix(iOS): classify CFNetwork as a system framework in the header incl… #247

Job	Run time
determine_mode	3s
set_hermes_version	0s
publish_bumped_packages	58s
prebuild_apple_dependencies	0s
build_android	0s
prebuild_react_native_core	0s
publish_react_native	0s
bump_podfile_lock	0s
generate_changelog	-1s
post_publish	-1s
create_draft_release	-1s
	58s

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