Allow overriding ES in sphere example #2327

Job	Run time
coverage	1m 32s
test (ubuntu-latest, 3.11)	1m 24s
test (macos-latest, 3.11)	7m 48s
test (windows-latest, 3.11)	5m 8s
examples	2m 57s
pin	2m 36s
pre-commit	53s
tutorials_list	4s
benchmarks	1m 25s
docs	1m 48s
tutorials (tutorials/arm_repertoire.ipynb)	1m 25s
tutorials (tutorials/cma_mae.ipynb)	2m 25s
tutorials (tutorials/features/example.ipynb)	56s
tutorials (tutorials/fooling_mnist.ipynb)	2m 27s
tutorials (tutorials/lsi_mnist.ipynb)	2m 51s
tutorials (tutorials/lunar_lander.ipynb)	2m 3s
tutorials (tutorials/tom_cruise_dqd.ipynb)	6m 2s
deploy	0s
	43m 44s

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