ssh: polish docs #19284

Job	Run time
Event File	4s
Build Erlang/OTP (64-bit)	7m 25s
Build Erlang/OTP (iOS)	3m 35s
Build Erlang/OTP (Types and Flavors)	7m 19s
Build Erlang/OTP (macOS)	3m 5s
Build Erlang/OTP (Windows)	19m 36s
Build Erlang/OTP (32-bit)	9m 45s
Build Erlang/OTP (cross-compile)	15m 6s
Build and check documentation	4m 57s
Run static analysis	6m 19s
Build Erlang/OTP (clang)	5m 28s
Test Erlang/OTP (ssh)	20m 12s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	7m 21s
	1h 50m 12s

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