parley: Fix swash example rendering. #288

Job	Run time
cargo check (msrv) (android) (armv7-linux-androideabi)	55s
cargo clippy (android) (armv7-linux-androideabi)	1m 34s
cargo clippy (windows-latest)	3m 49s
cargo check (msrv) (android) (aarch64-linux-android)	53s
cargo check (msrv) (windows-latest)	2m 54s
cargo clippy (android) (aarch64-linux-android)	1m 38s
cargo clippy (macos-latest)	1m 41s
cargo check (msrv) (android) (x86_64-linux-android)	52s
cargo check (msrv) (macos-latest)	1m 12s
cargo clippy (android) (x86_64-linux-android)	1m 37s
cargo clippy (ubuntu-latest)	1m 57s
cargo check (msrv) (ubuntu-latest)	58s
cargo doc (windows-latest)	3m 29s
cargo fmt	26s
typos	6s
cargo doc (macos-latest)	1m 7s
cargo test (windows-latest)	4m 12s
cargo doc (ubuntu-latest)	1m 7s
cargo test (macos-latest)	1m 32s
cargo test (ubuntu-latest)	2m 0s
	33m 59s

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