Update CHANGELOG.md for release (#969)

Author: jdpleiness

CHANGELOG.md

@@ -17,10 +17,15 @@ All notable changes to `src-cli` are documented in this file.
 
 ### Fixed
 
-- Fixed `src admin create` returning token to stderr instead of stdout.
-
 ### Removed
 
+## 5.0.3
+
+### Fixed
+
+- Fixed `src admin create` returning token to stderr instead of stdout. [963](https://github.com/sourcegraph/src-cli/pull/963)
+- Fixed `src validate install` failure with Sourcegraph v5.0.0. [964](https://github.com/sourcegraph/src-cli/pull/964)
+
 ## 5.0.2
 
 ### Added