update rn-replicated-sdk.md

Author: diamonwiggins

docs/release-notes/rn-replicated-sdk.md

@@ -8,6 +8,13 @@ pagination_prev: null
 
 This topic contains release notes for the [Replicated SDK](/vendor/replicated-sdk-overview). The release notes list new features, improvements, bug fixes, known issues, and breaking changes. 
 
+## 1.3.0
+
+Released on March 20, 2025
+
+### Improvements {#improvements-1-3-0}
+* Updates endpoint resolution to prioritize custom domains provided via params before falling back to the license endpoint.
+
 ## 1.2.0
 
 Released on March 11, 2025