Upgrade to Spock 2.3 (#8634)

Author: smola

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ okhttp = "3.12.15" # Datadog fork to support Java 7
 okhttp-legacy = "[3.0,3.12.12]" # 3.12.x is last version to support Java7
 okio = "1.17.6" # Datadog fork
 
-spock = "2.2-groovy-3.0"
+spock = "2.3-groovy-3.0"
 groovy = "3.0.17"
 junit5 = "5.9.2"
 logback = "1.2.3"