chore(deps): Bump actions/checkout from 3.5.3 to 4.0.0 #1393

Job	Run time
test / test-dart-vm (3.0.1)	1m 49s
test / test-dart-vm (stable)	1m 43s
native_test / test-dart-native (macos-latest)	2m 29s
native_test / test-dart-native (windows-latest)	2m 27s
dart2js_test / test-dart-2js (3.0.1, chrome)	1m 50s
dart2js_test / test-dart-2js (3.0.1, firefox)	1m 56s
dart2js_test / test-dart-2js (stable, chrome)	1m 40s
ddc_test / test-dart-ddc (3.0.1, chrome)	1m 54s
dart2js_test / test-dart-2js (stable, firefox)	1m 53s
ddc_test / test-dart-ddc (3.0.1, firefox)	1m 49s
ddc_test / test-dart-ddc (stable, chrome)	1m 56s
ddc_test / test-dart-ddc (stable, firefox)	1m 55s
	23m 21s

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