Update to spring-security-release-plugin 1.0.3

Closes gh-1594

build.gradle

@@ -1,6 +1,6 @@
 plugins {
 	id "io.spring.convention.root"
-	id "io.spring.security.release" version "1.0.1"
+	id "io.spring.security.release" version "1.0.3"
 }
 
 group = "org.springframework.security"