Remove duplicate words in reference manual

Found using regular expression: \b(\w+)\s+\1\b

framework-docs/src/docs/asciidoc/data-access.adoc

@@ -6825,7 +6825,7 @@ The following query uses a bind variable:
 [source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
 .Kotlin
 ----
-	val first = client.sql("SELECT id, name FROM person WHERE WHERE first_name = :fn")
+	val first = client.sql("SELECT id, name FROM person WHERE first_name = :fn")
 	        .bind("fn", "Joe")
 	        .fetch().awaitSingle()
 ----

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

@@ -810,7 +810,7 @@ another `HttpMessageReader` for the actual parsing to a `Flux<Part>` and then si
 collects the parts into a `MultiValueMap`.
 By default, the `DefaultPartHttpMessageReader` is used, but this can be changed through the
 `ServerCodecConfigurer`.
-For more information about the `DefaultPartHttpMessageReader`, refer to to the
+For more information about the `DefaultPartHttpMessageReader`, refer to the
 {api-spring-framework}/http/codec/multipart/DefaultPartHttpMessageReader.html[javadoc of `DefaultPartHttpMessageReader`].
 
 On the server side where multipart form content may need to be accessed from multiple