arrow_up: Bump spring-boot from 2.4.8 to 2.5.4
<flatten-maven-plugin.version>1.2.5</flatten-maven-plugin.version>
<spring-javaformat-checkstyle.version>0.0.27</spring-javaformat-checkstyle.version>
- <spring-boot.version>2.4.8</spring-boot.version>
+ <spring-boot.version>2.5.4</spring-boot.version>
<spring-security-oauth2.version>2.3.8.RELEASE</spring-security-oauth2.version>
<springfox.version>3.0.0</springfox.version>
<swagger.version>1.5.21</swagger.version>
