Update dependency setup in dashboard README
Update dependency setup in dashboard README

No-try: true
Change-Id: I751229236f3aa81b99a02af3b6c7c60f5d59c33a
Reviewed-on: https://chromium-review.googlesource.com/c/catapult/+/3818722
Commit-Queue: John Chen <334fbfbb4df7c78f091ea1b77c69ca6ac731a3f3@chromium.org>
Reviewed-by: Wenbin Zhang <45ad8a1ff616a38a2202fd35571df81897c5f14f@google.com>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult