Update plugin com.diffplug.spotless to v7.0.3 (#13)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle

@@ -8,7 +8,7 @@ plugins {
   id 'org.sonarqube' version '6.1.0.5360'
 
   id 'org.openapi.generator' version '7.12.0'
-  id 'com.diffplug.spotless' version '7.0.2'
+  id 'com.diffplug.spotless' version '7.0.3'
 
   /*
     Applies analysis tools including checkstyle and OWASP Dependency checker.