Add Dependabot configuration for GitHub Actions (#1876) #561

Job	Run time
checks / readme-snippets	13s
checks / pre-commit	33s
checks / test (3.11, lowest-direct, ubuntu-latest)	42s
checks / test (3.10, lowest-direct, windows-latest)	2m 20s
checks / test (3.12, highest, ubuntu-latest)	52s
checks / test (3.10, highest, windows-latest)	2m 18s
checks / test (3.11, lowest-direct, windows-latest)	2m 30s
checks / test (3.11, highest, ubuntu-latest)	43s
checks / test (3.10, lowest-direct, ubuntu-latest)	44s
checks / test (3.10, highest, ubuntu-latest)	49s
checks / test (3.13, lowest-direct, windows-latest)	2m 24s
checks / test (3.12, lowest-direct, windows-latest)	3m 16s
checks / test (3.13, highest, ubuntu-latest)	46s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.12, highest, windows-latest)	3m 50s
checks / test (3.13, lowest-direct, ubuntu-latest)	42s
checks / test (3.11, highest, windows-latest)	2m 26s
checks / test (3.12, lowest-direct, ubuntu-latest)	51s
checks / test (3.14, highest, ubuntu-latest)	1m 12s
checks / test (3.13, highest, windows-latest)	2m 35s
checks / test (3.14, highest, windows-latest)	2m 20s
checks / test (3.14, lowest-direct, windows-latest)	3m 4s
	36m 17s

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