Bump spock.version from 2.2-groovy-4.0 to 2.3-groovy-4.0

Bumps `spock.version` from 2.2-groovy-4.0 to 2.3-groovy-4.0.

Updates `spock-core` from 2.2-groovy-4.0 to 2.3-groovy-4.0

Updates `spock-junit4` from 2.2-groovy-4.0 to 2.3-groovy-4.0

---
updated-dependencies:
- dependency-name: org.spockframework:spock-core
  dependency-type: direct:development
- dependency-name: org.spockframework:spock-junit4
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

e2e/pom.xml

@@ -15,7 +15,7 @@
     </parent>
 
     <properties>
-        <spock.version>2.2-groovy-4.0</spock.version>
+        <spock.version>2.3-groovy-4.0</spock.version>
     </properties>
     <dependencies>
         <dependency>