build: set service version to 0.9.3

Author: fxjordan

gradle.properties

@@ -1,7 +1,7 @@
 org.gradle.parallel=true
 java.version=14
 core.version=1.1.2
-service.version=0.9.2
+service.version=0.9.3
 service.name=de.rwth.dbis.acis.bazaar.service
 service.class=BazaarService
 jooq.version=3.14.4