Update spring boot to v2.6.2

Author: renovate-bot

gradle.properties

@@ -23,7 +23,7 @@ servletApiVersion=4.0.1
 slf4jVersion=1.7.32
 snakeyamlVersion=1.30
 spockVersion=2.0-groovy-3.0
-springBootVersion=2.6.1
+springBootVersion=2.6.2
 springVersion=5.3.14
 tomcatLog4jVersion=8.5.2
 tomcatVersion=9.0.56