docs: Update CHANGELOG for version 0.11.0

Added note about breaking changes for version 0.11.0 due to pointing to new Filecoin Onchain Cloud contracts.

Author: BigLep

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [0.11.0](https://github.com/filecoin-project/filecoin-pin/compare/v0.10.1...v0.11.0) (2025-10-31)
 
+### ⚠️ Breaking Functionality
+With the update to synpase 0.35.x, filecoin-pin is now using a new set of [Filecoin Onchain Cloud contracts](https://github.com/FilOzone/filecoin-services/releases/tag/v1.0.0).  DataSets created previously are no longer accessible through this version of Synapse.  While we know there will be more breaking API changes to come (see [planning issue for v1](https://github.com/filecoin-project/filecoin-pin/issues/187)), we are not aware of contract changes that will cause data loss.  That said, we are still in repaid devlopment and focused on stability, and maintaing data availabiltiy for Calibration contracts is not the Filecon Onchain Cloud working group's cheif concern.  If another "reset with new contracts" occurs on Calibration, we'll communicate in the corresponding filecoin-pin release.  
 
 ### Features
 
@@ -22,6 +24,7 @@
 ### Chores
 
 * move to the version of synapse-sdk on `next` branch ([#146](https://github.com/filecoin-project/filecoin-pin/issues/146)) ([528c6fa](https://github.com/filecoin-project/filecoin-pin/commit/528c6fac57d7582c77332c097058946a9d9852d2))
+   - This is what brought in the update to use new contracts discussed above.
 
 
 ### Documentation