chore(deps): update pnpm to v8.12.1 (#62)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -12,7 +12,7 @@
     "docs:dev": "vuepress dev src"
   },
   "license": "MIT",
-  "packageManager": "pnpm@8.11.0",
+  "packageManager": "pnpm@8.12.1",
   "dependencies": {
     "@types/katex": "0.16.7",
     "@types/three": "0.159.0",