Update dependency unplugin-vue-markdown to ^0.28.0

Author: renovate[bot]

package.json

@@ -55,7 +55,7 @@
     "typescript": "^5.8.3",
     "unplugin-auto-import": "^0.18.6",
     "unplugin-vue-components": "^0.27.5",
-    "unplugin-vue-markdown": "^0.26.3",
+    "unplugin-vue-markdown": "^0.28.0",
     "vite": "^5.4.19",
     "vite-plugin-pages": "^0.32.5",
     "vite-plugin-pwa": "^0.20.5",