Avoid showing private methods for external references #11265

Job	Run time
lint_ruby	22s
lint_node	36s
Ruby 3.1 on ubuntu-latest	15m 46s
Ruby 3.2 on ubuntu-latest	14m 25s
spelling	17s
Ruby 3.3 on ubuntu-latest	11m 42s
build_node (ubuntu-latest)	1m 22s
Verify Jekyll website builds	8s
Ruby 3.1 on macos-latest	9m 23s
build_node (macos-latest)	1m 23s
Ruby 3.2 on macos-latest	9m 0s
build_node (windows-latest)	7m 51s
Ruby 3.3 on macos-latest	6m 34s
Ruby 3.1 on windows-latest	22m 6s
Ruby 3.2 on windows-latest	21m 18s
Ruby 3.3 on windows-latest	21m 16s
	2h 23m 29s

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