chore: update fastify to ^5.0.0 (#273)

Author: Fdawgs

package.json

@@ -31,7 +31,7 @@
     "@fastify/pre-commit": "^2.1.0",
     "@types/node": "^22.0.0",
     "@types/simple-oauth2": "^5.0.7",
-    "fastify": "^5.0.0-alpha.4",
+    "fastify": "^5.0.0",
     "nock": "^13.5.4",
     "simple-get": "^4.0.1",
     "snazzy": "^9.0.0",