Update Spock framework version

The Spock framework has been updated from version 2.4-M1-groovy-4.0 to 2.4-M2-groovy-4.0. This update is essential to leverage the improvements and bug fixes included in the new version.

pom.xml

@@ -153,7 +153,7 @@
             <dependency>
                 <groupId>org.spockframework</groupId>
                 <artifactId>spock-bom</artifactId>
-                <version>2.4-M1-groovy-4.0</version>
+                <version>2.4-M2-groovy-4.0</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>