improved system prompt for gpt-4o #40

Job	Run time
Linux-aaarch64 with rust nightly	5m 0s
Linux-aaarch64 with rust nightly	5m 0s
Linux-x86_64 with rust nightly	4m 17s
Linux-x86_64 with rust nightly	4m 17s
Windows-aarch64 with rust nightly	9m 20s
Windows-aarch64 with rust nightly	9m 20s
Windows-x86_64 with rust nightly	9m 4s
Windows-x86_64 with rust nightly	9m 4s
Windows-x86_64-msvc with rust nightly	8m 34s
Windows-x86_64-msvc with rust nightly	8m 34s
macOS-x86_64 with rust nightly	3m 49s
macOS-x86_64 with rust nightly	3m 49s
macOS-aarch64 with rust nightly	3m 16s
macOS-aarch64 with rust nightly	4m 11s
	1h 27m 35s

Provide feedback