Update docker image to use pnpm version 8 #41

Job	Run time
check-version	11s
build / build-installer	1m 25s
frontend-checks / frontend-checks	1m 33s
frontend-tests / frontend-tests	59s
python-checks / python-checks	11s
python-tests / py3.10: linux-cuda-11_7	4m 24s
python-tests / py3.10: linux-rocm-5_2	6m 11s
python-tests / py3.10: linux-cpu	3m 39s
python-tests / py3.10: macos-default	4m 1s
python-tests / py3.10: windows-cpu	8m 18s
python-tests / py3.11: linux-cuda-11_7	4m 3s
python-tests / py3.11: linux-rocm-5_2	5m 26s
python-tests / py3.11: linux-cpu	3m 27s
python-tests / py3.11: macos-default	4m 18s
python-tests / py3.11: windows-cpu	7m 58s
publish-pypi	28s
publish-testpypi	25s
	56m 57s

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