update a statement about halt

Author: krofax

pages/stack/interop/superchain-upgrades.mdx

@@ -39,6 +39,7 @@ This contract is instrumental in managing and tracking the progression of protoc
 
 **[Superchain version signaling](https://specs.optimism.io/protocol/superchain-upgrades.html#superchain-version-signaling)** is a mechanism that allows nodes and clients to be aware of and prepare for upcoming protocol changes.
 This signaling is achieved through the **ProtocolVersion smart contract**, allowing chains to indicate their readiness for upcoming upgrades and ensuring that all participating chains are synchronized. 
+If the node see's a versioning signal onchain before the node software has been updated for a hardfork, the node will [halt](/stack/interop/superchain-upgrades#rolluphalt-flags-on-node-binaries) to prevent chain divergence
 Through this signaling:
 *   Nodes can anticipate and implement necessary adjustments ahead of time.
 *   Clients are informed about the protocol version they should be compatible with, ensuring seamless interactions across the Superchain.