fix

Author: nosan

spring-boot-project/spring-boot-docs/src/docs/antora/modules/reference/pages/features/external-config.adoc

@@ -640,7 +640,7 @@ TIP: Properties that use the `[index]` notation can be bound to Java `List` or `
 For more details see the xref:features/external-config.adoc#features.external-config.typesafe-configuration-properties[] section below.
 
 WARNING: YAML files cannot be loaded by using the `@PropertySource` or `@TestPropertySource` annotations.
-So, in the case that you need to load values that way, you need to use a properties file or use `@TestYamlPropertySource`
+So, in the case that you need to load values that way, you need to use a properties file.