Merge pull request #447 from grails/renovate/spring-core

Update spring core to v5.3.14

Author: puneetbehl

gradle.properties

@@ -24,7 +24,7 @@ slf4jVersion=1.7.32
 snakeyamlVersion=1.30
 spockVersion=2.0-groovy-3.0
 springBootVersion=2.6.1
-springVersion=5.3.13
+springVersion=5.3.14
 tomcatLog4jVersion=8.5.2
 tomcatVersion=9.0.56
 webdriverBinariesVersion=1.4