Update CI/CD workflow to setup headless display #749

Job	Run time
Check library dependencies ship with valid licenses	31s
Smoke test and building	41s
Running documentation style checks	32s
Building library documentation	10m 42s
Test library (pytwin-win10, 3.9)	9m 33s
Test library (pytwin-win10, 3.10)	10m 5s
Test library (pytwin-win10, 3.11)	13m 15s
Test library (pytwin-win10, 3.12)	14m 4s
Test library (ubuntu-20.04, 3.9)	2m 15s
Test library (ubuntu-20.04, 3.10)	1m 32s
Test library (ubuntu-20.04, 3.11)	2m 13s
Test library (ubuntu-20.04, 3.12)	2m 25s
Deploy developers documentation	0s
Deploy stable documentation	0s
Release to public PyPI	0s
	1h 7m 48s

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