fix: upgrade fastify from 5.2.0 to 5.2.1

Snyk has created this PR to upgrade fastify from 5.2.0 to 5.2.1.

See this package in npm:
fastify

See this project in Snyk:
https://app.snyk.io/org/misskeyhq/project/cfa6dcce-3d31-43cb-8716-3d435f32ee0f?utm_source=github-cloud-app&utm_medium=referral&page=upgrade-pr

package.json

@@ -32,7 +32,7 @@
     "@types/escape-regexp": "0.0.3",
     "@types/node": "22.10.2",
     "debug": "4.4.0",
-    "fastify": "5.2.0",
+    "fastify": "5.2.1",
     "jest": "29.7.0",
     "lefthook": "1.10.0",
     "typescript": "5.7.2"