Remove Python 3.8 job from github CI #234

Job	Run time
Check if changelog was changed	17s
Generate examples	6m 57s
Run lint checks	1m 29s
Package cores repository	6m 22s
Test package distribution	5m 21s
Run tests on python 3.10	8m 49s
Run tests on python 3.11	4m 53s
Run tests on python 3.13	7m 15s
Run tests on python 3.9	8m 27s
Run tests on python 3.12	7m 3s
Test typing	3m 23s
	1h 0m 16s

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