Fix stale syntax errors in playground #34388

Job	Run time
Determine changes	13s
pre-commit	34s
mkdocs	3m 9s
cargo fmt	22s
python package	1m 29s
benchmarks	4m 47s
cargo build (release)	6m 0s
cargo build (msrv)	3m 35s
cargo clippy	1m 49s
cargo fuzz	4m 33s
cargo test (linux)	4m 9s
cargo shear	26s
cargo test (wasm)	1m 35s
cargo test (windows)	7m 34s
formatter instabilities and black similarity	0s
test scripts	1m 9s
test ruff-lsp	12s
ecosystem	16s
Fuzz the parser	0s
	41m 52s

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