Update changelog for `wayland-backend` #1209

Job	Run time
format	9s
cargo-deny	23s
clippy-check	1m 13s
check-minimal	1m 5s
coverage-main	1m 52s
coverage-tests	1m 44s
Documentation on Github Pages	1m 10s
coverage-tests (server_system)	1m 57s
coverage-tests (client_system)	1m 53s
msrv	2m 4s
coverage-tests (client_system, server_system)	1m 57s
publish	4s
	15m 31s

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