fix: fix allowTags repeat mark

Author: rookie-luochao

.changeset/tall-forks-train.md

@@ -0,0 +1,5 @@
+---
+'openapi-ts-request': patch
+---
+
+fix: fix allowTags repeat mark

src/generator/util.ts

@@ -404,19 +404,18 @@ export function markAllowSchema(
   schemaStr: string,
   schemas: ComponentsObject['schemas']
 ) {
-  const refs = schemaStr.match(/#\/components\/schemas\/([A-Za-z0-9._-]+)/g);
+  const refs = schemaStr?.match(/#\/components\/schemas\/([A-Za-z0-9._-]+)/g);
 
   forEach(refs, (ref) => {
     const refPaths = ref.split('/');
     const schema = schemas?.[
       refPaths[refPaths.length - 1]
     ] as ICustomSchemaObject;
 
-    if (schema) {
+    if (!schema?.isAllowed) {
       schema.isAllowed = true;
+      markAllowSchema(JSON.stringify(schema), schemas);
     }
-
-    markAllowSchema(JSON.stringify(schema), schemas);
   });
 }