ReadMe update + clippy error #2898

Job	Run time
doc-lints	52s
godot-itest (macos)	1m 35s
license-guard	34s
clippy	2m 0s
godot-itest (windows)	3m 25s
run-examples	1m 21s
godot-itest (linux-full)	2m 31s
rustfmt	24s
unit-test	2m 31s
godot-itest (linux-features-experimental)	2m 13s
godot-itest (linux-4.1)	1m 28s
godot-itest (linux-4.2)	1m 24s
godot-itest (linux-memcheck)	2m 48s
ci-status	2s
	23m 8s

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