Start building against Reactor 2022.0.0-M6 snapshots

See gh-29128

build.gradle

@@ -26,6 +26,7 @@ configure(allprojects) { project ->
 		mavenCentral()
 		maven { url "https://repo.spring.io/libs-spring-framework-build" }
 		maven { url "https://repo.spring.io/milestone" } // temporarily for context-propagation via Reactor Netty
+		maven { url "https://repo.spring.io/snapshot" } // reactor
 	}
 	configurations.all {
 		resolutionStrategy {

framework-platform/framework-platform.gradle

@@ -10,7 +10,7 @@ dependencies {
 	api(platform("com.fasterxml.jackson:jackson-bom:2.13.3"))
 	api(platform("io.netty:netty-bom:4.1.80.Final"))
 	api(platform("io.netty:netty5-bom:5.0.0.Alpha3"))
-	api(platform("io.projectreactor:reactor-bom:2022.0.0-M5"))
+	api(platform("io.projectreactor:reactor-bom:2022.0.0-SNAPSHOT"))
 	api(platform("io.rsocket:rsocket-bom:1.1.2"))
 	api(platform("org.apache.groovy:groovy-bom:4.0.4"))
 	api(platform("org.apache.logging.log4j:log4j-bom:2.18.0"))