Polish

Closes gh-22717

Author: snicoll

src/docs/asciidoc/web/webflux-functional.adoc

@@ -150,7 +150,7 @@ The following example shows how to access multiparts, one at a time, in streamin
 ====
 [source,java]
 ----
-Flux<Part> parts = request.body(BodyExtractos.toParts());
+Flux<Part> parts = request.body(BodyExtractors.toParts());
 ----
 ====