Use `@boolean` for `true` and `false` in highlights #44210

Job	Run time
Check formatting and spelling	27s
Check Postgres and Protobuf migrations, mergability	12s
(Linux) Build Remote Server	1m 27s
(Linux) Run Clippy and tests	9m 52s
(macOS) Run Clippy and tests	7m 3s
(Windows) Run Clippy and tests	15m 36s
Create a macOS bundle	0s
Linux arm64 release bundle	0s
Linux x86_x64 release bundle	0s
Auto release preview	0s
	34m 37s

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