Fix import in docs

Closes gh-16017

Author: snicoll

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -2172,7 +2172,7 @@ If you need to add or customize converters, you can use Spring Boot's
 
 [source,java,indent=0]
 ----
-	import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
+	import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
 	import org.springframework.context.annotation.*;
 	import org.springframework.http.converter.*;