Fix autoconfig dependency when metrics enabled

Signed-off-by: Thomas Vitale <ThomasVitale@users.noreply.github.com>

Author: ThomasVitale

spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/chat/observation/ChatObservationAutoConfiguration.java

@@ -38,7 +38,7 @@
  * @since 1.0.0
  */
 @AutoConfiguration(
-		afterName = "org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration.class")
+		afterName = { "org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration" })
 @ConditionalOnClass(ChatModel.class)
 @EnableConfigurationProperties({ ChatObservationProperties.class })
 public class ChatObservationAutoConfiguration {

spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/embedding/observation/EmbeddingObservationAutoConfiguration.java

@@ -32,7 +32,7 @@
  * @since 1.0.0
  */
 @AutoConfiguration(
-		afterName = "org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration.class")
+		afterName = "org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration")
 @ConditionalOnClass(EmbeddingModel.class)
 public class EmbeddingObservationAutoConfiguration {