Use correct API docs URL

Closes gh-15030

Author: sjohnr

build.gradle

@@ -37,7 +37,7 @@ springRelease {
 	weekOfMonth = 3
 	dayOfWeek = 1
 	referenceDocUrl = "https://docs.spring.io/spring-security/reference/{version}/index.html"
-	apiDocUrl = "https://docs.spring.io/spring-security/docs/{version}/api/"
+	apiDocUrl = "https://docs.spring.io/spring-security/site/docs/{version}/api/"
 	replaceSnapshotVersionInReferenceDocUrl = true
 }