chore(site): update devDependencies (#3951)

Author: anlyyao

packages/tdesign-miniprogram/site/package.json

@@ -29,7 +29,7 @@
     "playwright": "^1.19.1",
     "prismjs": "^1.24.1",
     "tdesign-icons-view": "^0.4.0",
-    "tdesign-theme-generator": "^1.1.0",
+    "tdesign-theme-generator": "^1.1.8",
     "vite": "^6.2.3",
     "vite-plugin-tdoc": "^2.0.1"
   }