Bump dart-lang/setup-dart from 1.5.1 to 1.6.0 (#1038) #842

Job	Run time
mono_repo self validate	19s
analyze_and_format; Dart 2.19.0; PKG: pkgs/http_client_conformance_tests; `dart analyze --fatal-i...	30s
analyze_and_format; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests; `dart format -...	29s
analyze_and_format; Dart 3.0.0; PKG: pkgs/http; `dart analyze --fatal-infos`	42s
analyze_and_format; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests; `dart analyze ...	34s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart test --platform vm`	56s
unit_test; Dart dev; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_defau...	26s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart test --platform chrome`	3m 36s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_def...	26s
unit_test; Dart dev; PKG: pkgs/http; `dart test --platform chrome`	3m 0s
unit_test; Dart dev; PKG: pkgs/http; `dart test --platform vm`	44s
	11m 42s

Provide feedback