Bump dart-lang/setup-dart from 1.5.0 to 1.5.1 #979

Job	Run time
mono_repo self validate	18s
analyzer_and_format; Dart 3.0.0; PKGS: _test_yaml, checked_yaml, example, json_annotation, json_s...	44s
analyzer_and_format; Dart dev; PKGS: _test_yaml, checked_yaml, example, json_annotation, json_ser...	46s
unit_test; Dart 3.0.0; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/en...	1m 15s
unit_test; Dart 3.0.0; PKG: json_serializable; `dart test -p chrome`	2m 3s
unit_test; Dart 3.0.0; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/an...	4m 6s
unit_test; Dart 3.0.0; PKGS: _test_yaml, checked_yaml, example, json_serializable; `dart test`	1m 37s
unit_test; Dart dev; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/anno...	4m 5s
unit_test; Dart dev; PKG: json_serializable; `dart test -p chrome`	2m 11s
unit_test; Dart dev; PKGS: _test_yaml, checked_yaml, example, json_serializable; `dart test`	1m 38s
unit_test; Dart dev; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/ensu...	1m 21s
ensure_build; Dart 3.0.0; PKGS: _test_yaml, checked_yaml, example; `dart test --run-skipped -t pr...	2m 18s
ensure_build; Dart dev; PKGS: _test_yaml, checked_yaml, example; `dart test --run-skipped -t pres...	3m 10s
	25m 32s

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