Add change note

Author: Sauyon Lee

java/change-notes/2021-07-01-spring-webutil.md

@@ -0,0 +1,4 @@
+lgtm,codescanning
+* Additional flow steps in the `org.springframework.web.util` package of the Spring framework have
+  been modelled.  This may result in additional results for security queries on projects using this
+  framework.