Document the IME cursor area workaround (#826) #2601

Job	Run time
formatting	37s
cargo check (aarch64-android)	18s
cargo check (msrv) (windows-latest)	2m 11s
cargo clippy (windows-latest)	4m 57s
cargo check (msrv) (wasm32)	22s
cargo check (msrv) (macos-latest)	31s
cargo clippy (macos-latest)	2m 20s
cargo check (msrv) (ubuntu-latest)	41s
cargo clippy (wasm32)	1m 52s
cargo clippy (ubuntu-latest)	3m 16s
Prime LFS Cache	3s
cargo doc	42s
cargo test (wasm32)	19s
typos	5s
cargo test (windows-latest)	4m 2s
cargo test (macos-latest)	1m 48s
cargo test (ubuntu-latest)	3m 20s
	27m 24s

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