fix(deps): update spring webflow to v2.5.1.release

Author: renovate[bot]

gradle.properties

@@ -103,7 +103,7 @@ springfoxSwaggerVersion=2.9.2
 springLdapVersion=2.3.4.RELEASE
 springModulesCacheVersion=0.8
 springSecurityVersion=4.2.20.RELEASE
-springWebflowVersion=2.4.8.RELEASE
+springWebflowVersion=2.5.1.RELEASE
 staxmateVersion=2.4.0
 stringtemplateVersion=4.3.4
 tikaVersion=1.28.5