hotfix pyzmq installation on bullseye (pin version <26) (#2345) #418

Job	Run time
bookworm armv7 / build	14m 58s
bullseye armv7 / build	15m 0s
bookworm armv7 / test (run_install_common.sh)	14m 17s
bookworm armv7 / test (run_install_faststartup.sh)	10m 9s
bookworm armv7 / test (run_install_webapp_local.sh)	21m 9s
bookworm armv7 / test (run_install_webapp_download.sh)	13m 24s
bookworm armv7 / test (run_install_libzmq_local.sh)	25m 1s
bullseye armv7 / test (run_install_common.sh)	13m 30s
bullseye armv7 / test (run_install_faststartup.sh)	9m 57s
bullseye armv7 / test (run_install_webapp_local.sh)	23m 51s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 30s
bullseye armv7 / test (run_install_libzmq_local.sh)	25m 52s
bookworm armv7 / cleanup	2s
bullseye armv7 / cleanup	3s
	3h 21m 43s

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