Revert to Spring Integration 6.0.0-RC1

Latest snapshots contain breaking changes that we do not yet know how
to address.

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationAutoConfigurationScanRegistrar.java

@@ -24,7 +24,6 @@ import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.BeanFactoryAware;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.boot.autoconfigure.AutoConfigurationPackages;
-import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.type.AnnotationMetadata;
 import org.springframework.integration.annotation.IntegrationComponentScan;
 import org.springframework.integration.config.IntegrationComponentScanRegistrar;
@@ -53,7 +52,8 @@ class IntegrationAutoConfigurationScanRegistrar extends IntegrationComponentScan
 	}
 
 	@Override
-	protected Collection<String> getBasePackages(AnnotationAttributes componentScan, BeanDefinitionRegistry registry) {
+	protected Collection<String> getBasePackages(AnnotationMetadata importingClassMetadata,
+			BeanDefinitionRegistry registry) {
 		return (AutoConfigurationPackages.has(this.beanFactory) ? AutoConfigurationPackages.get(this.beanFactory)
 				: Collections.emptyList());
 	}

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -1448,7 +1448,7 @@ bom {
 			]
 		}
 	}
-	library("Spring Integration", "6.0.0-SNAPSHOT") {
+	library("Spring Integration", "6.0.0-RC1") {
 		group("org.springframework.integration") {
 			imports = [
 				"spring-integration-bom"