Temporarily ignore samples

Spring for GraphQL auto-configuration is not supported yet in Spring
Boot 3.0 SNAPSHOTs, so we need to ignore Spring Boot samples until
SNAPSHOTs are produced.

See gh-424

settings.gradle

@@ -26,11 +26,7 @@ plugins {
 rootProject.name = 'spring-graphql'
 include 'spring-graphql',
 	'spring-graphql-test',
-	'spring-graphql-docs',
-	'samples:webmvc-http',
-	'samples:webmvc-http-security',
-	'samples:webflux-security',
-	'samples:webflux-websocket'
+	'spring-graphql-docs'
 
 settings.gradle.projectsLoaded {
 	gradleEnterprise {