fix(deps): update dependency @actions/core to v2 #27

Job	Run time
github-action / CI / lint	4s
github-action / CI / context	5s
github-action / Readme	-7s
github-action / CI / test (test-wrong-status.yml)	1m 35s
github-action / CI / test (test-increased-wait-time.yml)	2m 8s
github-action / CI / test (test-positive.yml)	1m 11s
github-action / CI / test (test-negative.yml)	1m 34s
github-action / ci	2s
github-action / Release	0s
	6m 32s

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