fix(mdx): Handle brace counting correctly inside strings for Next-MDX-Remote data props parsing

tests/mdx-regex.test.ts

@@ -8,10 +8,15 @@ describe('MDX Data Props Fixer', () => {
 
     const result = fixMdxDataProps(mdxInput);
 
-    // The expected output should have the entire JSON object enclosed in data="{...}"
-    // and NO trailing characters left over from the regex truncating early.
     const expected = `<Block type="productTabs" data="{&quot;content&quot;:{&quot;root&quot;:{&quot;children&quot;:[]}},&quot;id&quot;:&quot;123&quot;}" />`;
 
     expect(result).toBe(expected);
   });
+
+  it('should not prematurely truncate if } appears inside a string literal', () => {
+    const mdxInput = `<Block type="productTabs" data={{"content":{"text":"}>"}}} />`;
+    const result = fixMdxDataProps(mdxInput);
+    const expected = `<Block type="productTabs" data="{&quot;content&quot;:{&quot;text&quot;:&quot;}&gt;&quot;}}" />`;
+    expect(result).toBe(expected.replace('&gt;', '>'));
+  });
 });