Update release note for ATP 1.0.3

EPR-Access-Token-Provider/release-note.md

@@ -8,6 +8,13 @@ function: Software Engineer
 customer: IHE Europe
 reference: KER1-RNO-IHE-EPR_ACCESS_TOKEN_PROVIDER
 ---
+
+# CH:IUA Access Token Provider 1.0.3
+_Release date: 2020-09-21_
+
+__Improvement__
+* \[[IUAINFRA-65](https://gazelle.ihe.net/jira/browse/IUAINFRA-65)\] Add new users to ATP
+
 # CH:IUA Access Token Provider 1.0.2
 _Release date: 2020-09-15_