Add dependabot configuration for GitHub Actions (#12) #27

Job	Run time
yamllint	5s
pytest / setup	3s
pytest / pytest (macos-latest, 3.8)	1m 5s
pytest / pytest (macos-latest, 3.9)	41s
pytest / pytest (macos-latest, 3.10)	34s
pytest / pytest (macos-latest, 3.11)	32s
pytest / pytest (macos-latest, 3.12)	37s
pytest / pytest (ubuntu-22.04, 3.8)	1m 23s
pytest / pytest (ubuntu-22.04, 3.9)	4m 3s
pytest / pytest (ubuntu-22.04, 3.10)	1m 9s
pytest / pytest (ubuntu-22.04, 3.11)	1m 13s
pytest / pytest (ubuntu-22.04, 3.12)	3m 21s
pytest / pytest (windows-latest, 3.8)	1m 54s
pytest / pytest (windows-latest, 3.9)	1m 47s
pytest / pytest (windows-latest, 3.10)	1m 58s
pytest / pytest (windows-latest, 3.11)	1m 41s
pytest / pytest (windows-latest, 3.12)	1m 54s
pytest / pytest (ubuntu-20.04, 3.6)	33s
	24m 33s

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