arrow_up: Bump SpringBoot from 2.6.7 to 2.7.0
<flatten-maven-plugin.version>1.2.7</flatten-maven-plugin.version>
<spring-javaformat-checkstyle.version>0.0.31</spring-javaformat-checkstyle.version>
- <spring-boot.version>2.6.7</spring-boot.version>
+ <spring-boot.version>2.7.0</spring-boot.version>
<spring-boot-admin.version>2.6.6</spring-boot-admin.version>
<spring-security-oauth2.version>2.3.8.RELEASE</spring-security-oauth2.version>
<springfox.version>3.0.0</springfox.version>
