build(deps): bump dart-lang/setup-dart from 1.6.5 to 1.7.0 (#2461) #1665

Job	Run time
android \| ubuntu-latest \| stable	1m 4s
cancel-previous-workflow	7s
android \| ubuntu-latest \| beta	1m 8s
linux \| ubuntu-latest \| stable	1m 27s
linux \| ubuntu-latest \| beta	1m 20s
ios \| macos-latest \| stable	1m 24s
macos \| macos-latest \| stable	1m 33s
windows \| windows-latest \| stable	2m 15s
analyze / analyze	1m 29s
analyze / cancel-previous-workflow	5s
analyze / package-analysis	1m 36s
	13m 28s

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