printrun: rename cython_3 to cython #1157

Job	Run time
Get list of packages to build	25s
Build easyeffects_7_0_4	4m 48s
Build litedram	43s
Build tailscale-systray	49s
Build bedstead	29s
Build ifgraph	28s
Build breeze-enhanced	59s
Build esp-rust-bin	1m 40s
Build squeak_4_10	1m 33s
Build klassy	3m 5s
Build nilium	24s
Build printrun	52s
Build vkcube	31s
Build plasma5-wallpapers-dynamic	1m 13s
Build phinger-cursors	24s
Build nextpnr-unstable	29m 41s
Build scratch-unwrapped	1m 34s
Build ckan	22m 13s
Build ksysguard	1m 29s
Build plasma-applet-thermal-monitor	1m 5s
Build icesprog	34s
Build lilex	29s
Build scratch	1m 40s
Build cargo-espflash	1m 12s
Build jfchmotfsdynfetch	24s
Build thermalmonitor	51s
Wait for build(s) to succeed	1s
	1h 19m 36s

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