Update io.projectreactor to 2023.0.0-M2

Closes gh-13686

buildSrc/build.gradle

@@ -87,7 +87,7 @@ dependencies {
 	implementation localGroovy()
 
 	implementation 'io.github.gradle-nexus:publish-plugin:1.1.0'
-	implementation 'io.projectreactor:reactor-core:3.5.8'
+	implementation 'io.projectreactor:reactor-core:3.6.0-M2'
 	implementation 'org.gretty:gretty:4.0.3'
 	implementation 'com.apollographql.apollo:apollo-runtime:2.4.5'
 	implementation 'com.github.ben-manes:gradle-versions-plugin:0.38.0'

gradle.properties

@@ -1,5 +1,5 @@
 aspectjVersion=1.9.19
-reactorVersion=2022.0.9
+reactorVersion=2023.0.0-M2
 springJavaformatVersion=0.0.39
 springBootVersion=3.1.1
 springDataVersion=2022.0.7