docs: Fix typo in "lock time" in Zk Proof Update settlement.md

[famouswizard]

Description:

I’ve noticed a small typo in the section Zk Proof on the Provider Side where "lock time" was written without a hyphen. The correct format should be "lock-time" as it’s commonly used as a compound adjective to describe lock time, and adding the hyphen enhances readability.

Here’s the fix:

• lock-time: Lock-time