ci: install libcairo2-dev on ubuntu-latest #250

Job	Run time
build (ubuntu-20.04, 3.9)	2m 25s
build (ubuntu-20.04, 3.x)	2m 29s
test-ubuntu-system-python (ubuntu-latest)	49m 39s
build (ubuntu-latest, 3.9)	2m 34s
build (ubuntu-latest, 3.x)	2m 54s
build (macos-13, 3.9)	3m 18s
build (macos-13, 3.x)	3m 24s
build (macos-latest, 3.9)	3m 10s
build (macos-latest, 3.x)	1m 43s
build (windows-2019, 3.9)	3m 16s
build (windows-2019, 3.x)	4m 48s
build (windows-latest, 3.9)	4m 19s
build (windows-latest, 3.x)	4m 16s
	1h 28m 15s

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