Added incentivized link changelog

Author: anthonydiscord

docs/change-log/2025-04-11-incentivized-links.md

@@ -0,0 +1,14 @@
+---
+title: "Custom Incentivized Links"
+date: "2025-04-11"
+topics:
+- "Activities"
+- "Embedded App SDK"
+---
+
+### Custom Incentivized Links
+
+- shareLink will now let you attach custom params to links you share about your game using `custom_id`
+- Removed `referrer_id` from shareLink API. Any uses of `referrer_id` should be moved over to use `custom_id` instead. Passing `referrer_id` to shareLink will silently fail
+
+Learn more about [creating and managing Custom Incentivized Links](https://discord.com/developers/docs/activities/development-guides#creating-and-managing-custom-incentivized-links) and [how to generate them from within your activity](https://discord.com/developers/docs/activities/development-guides#generating-a-custom-link-within-your-activity) with the shareLink API