go: correct go_test_tags docstring (#385)
go: correct go_test_tags docstring (#385)

The docstring for `go_web_test_suite`'s `go_test_tags` referenced `dart_test` but should be `go_test`.
DrMarcII/rules_webtesting,bazelbuild/rules_webtesting,bazelbuild/rules_webtesting,bazelbuild/rules_webtesting,DrMarcII/rules_webtesting,bazelbuild/rules_webtesting,DrMarcII/rules_webtesting,DrMarcII/rules_webtesting