fix: concurrent merkle tree, wrong upper_leaf in update_proof_from_changelog

[sergeytimoshin]

No description provided.

[ananas-block]

Thanks!
Can you add this change as well?

light-protocol/merkle-tree/concurrent/src/lib.rs

Line 896 in c454ebc

if self.changelog_capacity > 0 && changelog_index != self.changelog_index() {

It doesn't try to update the proof when the root is the same as onchain.

[ananas-block]

weird that onchain tests are not triggered by rust library changes.
@sergeytimoshin can you enable program tests for changes on the merkle-tree/* folder as well?