Update dependency fastify to v5 [SECURITY]

Author: renovate[bot]

package.json

@@ -15,7 +15,7 @@
         "axios": "^0.27.2",
         "discord-oauth2": "^2.10.0",
         "discord.js": "^14.6.0",
-        "fastify": "^4.7.0",
+        "fastify": "^5.0.0",
         "mongoose": "^6.6.5"
     },
     "devDependencies": {