Merge pull request #3794 from baomidou/dependabot/gradle/springBootVersion-2.5.3

Bump springBootVersion from 2.4.5 to 2.5.3

build.gradle

@@ -15,7 +15,7 @@ ext {
         mybatisSpringVersion = '2.0.6',
         mybatisSpringBootStarterVersion = '2.2.0',
         springVersion = '5.3.7',
-        springBootVersion = '2.4.5',
+        springBootVersion = '2.5.3',
         jsqlparserVersion = '4.1',
         junitVersion = '5.7.2',
     ]