Update dependency vite-plugin-pwa to ^0.21.0

Author: renovate[bot]

package.json

@@ -58,7 +58,7 @@
     "unplugin-vue-markdown": "^0.26.3",
     "vite": "^5.4.19",
     "vite-plugin-pages": "^0.32.5",
-    "vite-plugin-pwa": "^0.20.5",
+    "vite-plugin-pwa": "^0.21.0",
     "vite-plugin-vue-layouts": "^0.11.0",
     "vite-ssg": "^0.23.8",
     "vite-ssg-sitemap": "^0.6.1",