message: Update spring-boot version to 2.2.3.RELEASE
diff: <jhipster-dependencies.version>3.2.0-SNAPSHOT</jhipster-dependencies.version>
  <!-- The spring-boot version should match the one managed by
  https://mvnrepository.com/artifact/io.github.jhipster/jhipster-dependencies/${jhipster-dependencies.version} -->
  - <spring-boot.version>2.2.2.RELEASE</spring-boot.version>
  + <spring-boot.version>2.2.3.RELEASE</spring-boot.version>
  <archunit-junit5.version>0.12.0</archunit-junit5.version>
  <mapstruct.version>1.3.1.Final</mapstruct.version>
  <!-- Plugin versions -->
  