Merge pull request #999 from kubernetes-client/dependabot/maven/spring.boot.version-2.3.1.RELEASE

Bump spring.boot.version from 2.1.0.RELEASE to 2.3.1.RELEASE

Author: k8s-ci-robot

pom.xml

@@ -46,7 +46,7 @@
     <apache.commons.collections4.version>4.4</apache.commons.collections4.version>
     <apache.commons.compress>1.19</apache.commons.compress>
     <common.codec.version>1.11</common.codec.version>
-    <spring.boot.version>2.1.0.RELEASE</spring.boot.version>
+    <spring.boot.version>2.3.1.RELEASE</spring.boot.version>
     <spring.version>5.1.2.RELEASE</spring.version>
   </properties>