Start building against Spring AMQP 2.2.1 snapshots

See gh-18762

Author: snicoll

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -185,7 +185,7 @@
 		<slf4j.version>1.7.28</slf4j.version>
 		<snakeyaml.version>1.25</snakeyaml.version>
 		<solr.version>8.2.0</solr.version>
-		<spring-amqp.version>2.2.0.RELEASE</spring-amqp.version>
+		<spring-amqp.version>2.2.1.BUILD-SNAPSHOT</spring-amqp.version>
 		<spring-batch.version>4.2.0.RELEASE</spring-batch.version>
 		<spring-cloud-connectors.version>2.0.6.RELEASE</spring-cloud-connectors.version>
 		<spring-data-releasetrain.version>Moore-RELEASE</spring-data-releasetrain.version>