Update parallel raytracing .gitignore (#3606) #1457

Job	Run time
build_nightly	2m 58s
build_benchmarks	1m 22s
Check	2m 41s
build_examples	5m 55s
Verify that web-sys is compiled correctly	1m 53s
Clippy	7m 1s
dist_linux_aarch64_gnu	5m 57s
dist_linux_x86_64_musl	3m 47s
dist_macos_aarch64	3m 43s
dist_macos_x86_64	2m 58s
dist_windows	5m 46s
doc_api	1m 50s
doc_book	38s
Rustfmt	8s
Build and test the deno example	1m 36s
Run js-sys crate tests	3m 27s
Run native tests	2m 50s
Run wasm-bindgen crate tests with multithreading enabled	2m 21s
Test TypeScript output of wasm-bindgen	1m 32s
Run UI compile-fail tests	4m 8s
Run wasm-bindgen crate tests (unix)	14m 0s
Run web-sys crate tests	8m 51s
Run wasm-bindgen-webidl crate tests	3m 14s
test_examples	3m 30s
deploy	3m 6s
	1h 35m 12s

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