fix validation

packages/remark-drawio/src/utils/embed.ts

@@ -2,8 +2,9 @@
 import pako from 'pako';
 import xmldoc from 'xmldoc';
 
+const unconpressedDataRegexp = new RegExp('<mxGraphModel');
 const validateUncompressedData = (input: string): boolean => {
-  return new RegExp('/<mxGraphModel/').test(input);
+  return unconpressedDataRegexp.test(input);
 };
 
 const validateCompressedData = (input: string): boolean => {
@@ -60,7 +61,7 @@ export const generateMxgraphData = (code: string): string => {
   // Evaluate the code is whether uncompressed data that are generated by v21.1.0 or above
   // see: https://github.com/jgraph/drawio/issues/3106#issuecomment-1479352026
   const isUncompressedData = validateUncompressedData(trimedCode);
-  if (isUncompressedData) {
+  if (!isUncompressedData) {
     validateCompressedData(trimedCode);
   }