wasm-module-builder: Fix left-over use of kWasmStmt#1812

rossberg merged 1 commit intoWebAssembly:wasm-3.0WebAssembly/spec:wasm-3.0from

backes:wasm-3.0-fix-wasmstmtbackes/spec:wasm-3.0-fix-wasmstmtCopy head branch name to clipboard