Update @since tag

This commit updates @since tag in CloudServiceConnectorsAutoConfiguration
as it has been renamed in cfd0ab7646.

Closes gh-14297

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cloud/CloudServiceConnectorsAutoConfiguration.java

@@ -41,7 +41,7 @@ import org.springframework.core.Ordered;
  * {@link ApplicationInstanceInfo}.
  *
  * @author Ramnivas Laddad
- * @since 1.2.0
+ * @since 2.1.0
  */
 @Configuration
 @Profile("cloud")