[ethereum/go-ethereum] les: fix CHTRoot on nodeinfo for les2 mode (#17459)

Fixing `CHTRoot: «0x0000000000000000000000000000000000000000000000000000000000000000″` while light sync is enabled as les2 by default
You can view, comment on, or merge this pull request online at:

https://github.com/ethereum/go-ethereum/pull/17459

— Commit Summary —

* les: fix CHTRoot on nodeinfo for les2 mode

— File Changes —

M les/commons.go (2)

— Patch Links —

https://github.com/ethereum/go-ethereum/pull/17459.patch
https://github.com/ethereum/go-ethereum/pull/17459.diff