[Release 2.0.0-M2] Update version

Author: github-actions[bot]

gradle.properties

@@ -1,4 +1,4 @@
-version=2.0.0-SNAPSHOT
+version=2.0.0-M2
 version.samples=2.0.0-SNAPSHOT
 
 org.gradle.caching=true

gradle/libs.versions.toml

@@ -23,7 +23,7 @@ hamcrest = "3.0"
 mockito = "5.17.0"
 spring-dep-mgmt = "1.1.7"
 spring-boot = "4.0.0-SNAPSHOT"
-spring-boot-for-docs = "4.0.0-SNAPSHOT"
+spring-boot-for-docs = "4.0.0-M2"
 spring-cloud-stream = "5.0.0-SNAPSHOT"
 system-lambda = "1.2.1"
 testcontainers = "1.21.3"