Update dependency org.codehaus.groovy:groovy to v3.0.12

Author: renovate[bot]

backend/pom.xml

@@ -20,7 +20,7 @@
 		<!-- backend dependencies -->
 		<rest-assured.version>4.5.1</rest-assured.version>
 		<postgresql.version>42.4.0</postgresql.version>
-		<groovy.version>3.0.11</groovy.version>
+		<groovy.version>3.0.12</groovy.version>
 	</properties>
 
 	<dependencies>