[VMService] - Add getClassList to service.md TOC
[VMService] - Add getClassList to service.md TOC

TEST=cq

Bug: https://github.com/dart-lang/sdk/issues/47497
Change-Id: Ie7544dfa2cc48cea99fd74333837f9c43895d11a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/217183
Reviewed-by: Siva Annamalai <2e618a8cbd7bb6b3d4409061ae407d692a098546@google.com>
Commit-Queue: Siva Annamalai <2e618a8cbd7bb6b3d4409061ae407d692a098546@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk