Fix typo

See gh-31518

spring-boot-project/spring-boot-docs/src/docs/asciidoc/web/spring-graphql.adoc

@@ -86,7 +86,7 @@ are detected by Spring Boot and considered as candidates for `DataFetcher` for m
 The GraphQL HTTP endpoint is at HTTP POST "/graphql" by default.
 The path can be customized with configprop:spring.graphql.path[].
 
-TIP: The HTTP endpoint for both Spring MVC and Spring WebFlux is provided by a `RouterFunction` bean with an `@Order` or `0`.
+TIP: The HTTP endpoint for both Spring MVC and Spring WebFlux is provided by a `RouterFunction` bean with an `@Order` of `0`.
 If you define your own `RouterFunction` beans, you may want to add appropriate `@Order` annotations to ensure that they are sorted correctly.
 
 The GraphQL WebSocket endpoint is off by default. To enable it: