ci: add changelog section for performance improvements #756

Job	Run time
Python (windows-latest, 3.12) / windows-latest, python 3.12	2m 53s
Python (windows-latest, 3.10) / windows-latest, python 3.10	3m 4s
Python (macos-latest, 3.12) / macos-latest, python 3.12	1m 23s
Python (macos-latest, 3.9) / macos-latest, python 3.9	1m 19s
Python (ubuntu-latest, 3.10) / ubuntu-latest, python 3.10	1m 15s
Python (macos-latest, 3.11) / macos-latest, python 3.11	2m 23s
Python (macos-latest, 3.10) / macos-latest, python 3.10	2m 51s
Python (windows-latest, 3.11) / windows-latest, python 3.11	2m 44s
Python (windows-latest, 3.9) / windows-latest, python 3.9	2m 44s
Python (ubuntu-latest, 3.9) / ubuntu-latest, python 3.9	1m 16s
Python (ubuntu-latest, 3.12) / ubuntu-latest, python 3.12	1m 15s
Python (ubuntu-latest, 3.11) / ubuntu-latest, python 3.11	1m 8s
	24m 15s

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