fix(articles): fix category type for markAllArticlesAsRead mutation

Author: ncarlier

pkg/schema/article.go

@@ -232,7 +232,7 @@ var markAllArticlesAsReadMutationField = &graphql.Field{
 
 func markAllArticlesAsReadResolver(p graphql.ResolveParams) (interface{}, error) {
 	var category *uint
-	if val, ok := tooling.ConvGQLIntToUint(p.Args["category"]); ok {
+	if val, ok := tooling.ConvGQLStringToUint(p.Args["category"]); ok {
 		category = &val
 	}