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fix(curriculum): update hint regex in step 30 of tree traversal (#70009)

Signed-off-by: Rishi Kumar <sanjaykarancat1975@gmail.com>
Co-authored-by: majestic-owl448 <26656284+majestic-owl448@users.noreply.github.com>
R
Rishi Kumar committed
c73aeaa1396c1149aa87d40160fcc87b4e5081d1
Parent: d5a69b3
Committed by GitHub <noreply@github.com> on 9/12/2026, 9:01:00 AM