[STRAT-5744]| Added Warning for breaking changes in Hubspot for referring custom object Types by base names.

src/connections/destinations/catalog/actions-hubspot-cloud/index.md

@@ -16,6 +16,15 @@ HubSpot is an all-in-one marketing tool that helps attract new leads and convert
 
 When you use the HubSpot Cloud Mode (Actions) destination, Segment sends your data to [HubSpot's REST API](https://developers.hubspot.com/docs/api/overview){:target="_blank"}.
 
+> warning ""
+> As of April 29, 2025, HubSpot no longer supports referencing custom object types by their base names. Instead, you must reference all custom objects by using their short-hand custom object type name, `fullyQualifiedName`, or `objectTypeId`. To avoid issues, update the following fields:
+>
+>- **Object Type** and **ObjectType to associate** in the **Upsert Custom Object Record** action
+>- **Object Type** field in the **Custom Event V2** action
+>- **Object Type** and **To Object Type** fields in the **Custom Object V2** action
+>
+> For further details, refer to the [HubSpot documentation](https://developers.hubspot.com/changelog/breaking-change-removed-support-for-referencing-custom-object-types-by-base-name){:target="_blank"}.
+
 > warning ""
 > The **Upsert Company** action is not compatible with the Mapping Tester on the mappings page if Associate Contact is set to **Yes**. As a result, Segment recommends using the Event Tester or other tools to test and troubleshoot creating and updating companies in HubSpot. 
 >