docs(infiniteQuery guide): include missing error (#1289)

Author: roachjc

docs/src/pages/docs/guides/infinite-queries.md

@@ -50,6 +50,7 @@ function Projects() {
     isFetchingMore,
     fetchMore,
     canFetchMore,
+    error,
   } = useInfiniteQuery('projects', fetchProjects, {
     getFetchMore: (lastGroup, allGroups) => lastGroup.nextCursor,
   })