docs(changelogs): add breaking changes for v27 (#3453)

* docs(changelogs): add breaking changes for v27 * Update changelog.md Co-authored-by: skosito <[email protected]> --------- Co-authored-by: skosito <[email protected]>
zeta-chain · Feb 3, 2025 · 1034da4 · 1034da4
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 ## v27.0.0
 
+### Breaking Changes
+
+* Universal contract calls from Bitcoin and Solana now follow the Protocol Contract V2 workflow.
+  * For `depositAndCall` and `call` operations, the `onCall` method is invoked on the Universal Contract from the gateway, replacing the previous behavior where `onCrossChainCall` was triggered by the `systemContract`.
+  * The interfaces of both functions remain the same.
+
 ### Features
 
 * [3353](https://github.com/zeta-chain/node/pull/3353) - add liquidity cap parameter to ZRC20 creation