Fix TestSampleSessionRedisApplication

Update the `@ServiceConnection` annotation to include the
service connection name.

See gh-35168

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-session-redis/src/test/java/smoketest/session/redis/TestSampleSessionRedisApplication.java

@@ -26,7 +26,7 @@ import org.springframework.context.annotation.Bean;
 public class TestSampleSessionRedisApplication {
 
 	@Bean
-	@ServiceConnection
+	@ServiceConnection("redis")
 	RedisContainer redisContainer() {
 		return new RedisContainer();
 	}