Replace example in README to using primitives #2429

Job	Run time
lint (3.10)	1m 50s
sdist (3.8, ubuntu-latest, x64)	3m 5s
sdist (3.9, ubuntu-latest, x64)	2m 38s
sdist (3.10, ubuntu-latest, x64)	2m 57s
sdist (3.11, ubuntu-latest, x64)	2m 39s
sdist (3.12.0, ubuntu-latest, x64)	2m 58s
tests-json-input (3.9, ubuntu-latest)	7m 0s
Windows Python 3.8	7m 9s
Windows Python 3.9	8m 2s
Windows Python 3.10	11m 24s
Windows Python 3.11	8m 6s
Windows Python 3.12.0	9m 0s
macOS Python 3.8	1s
macOS Python 3.9	1s
Linux Python 3.8	7m 15s
macOS Python 3.10	3m 57s
Linux Python 3.9	6m 59s
macOS Python 3.11	3m 38s
Linux Python 3.10	7m 20s
macOS Python 3.12.0	3m 39s
Linux Python 3.11	7m 19s
Linux Python 3.12.0	7m 5s
Linux Python 3.10 ('qiskit>=1.0.0rc1')	7m 17s
	2h 1m 19s

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