Update gradle.properties

gradle.properties

@@ -45,7 +45,7 @@ tomcatVersion                   =9.0.56
 tomcatembedloggingjuliVersion   =8.5.2
 #spring
 springVersion                   =5.3.14
-springBootVersion               =2.6.1
+springBootVersion               =2.6.2
 springSecurityVersion           =5.6.0
 springDataVersion               =2.6.0
 springSessionVersion            =2.6.0