fix: upgrade fastify from 4.14.1 to 4.15.0 (#220)

Snyk has created this PR to upgrade fastify from 4.14.1 to 4.15.0.

See this package in npm:
https://www.npmjs.com/package/fastify

See this project in Snyk:
https://app.snyk.io/org/nodeshift-agg/project/53f94480-e7ae-41d2-985c-270fae345664?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -34,7 +34,7 @@
     "cloudevents": "^6.0.4",
     "commander": "^10.0.0",
     "death": "^1.1.0",
-    "fastify": "^4.14.1",
+    "fastify": "^4.15.0",
     "js-yaml": "^4.1.0",
     "node-os-utils": "^1.3.7",
     "overload-protection": "^1.2.3",