fix(instrumentation-fastify): fix fastify typescript compilation issue (#1556)

Author: pichlermarc

plugins/node/opentelemetry-instrumentation-fastify/package.json

@@ -54,7 +54,7 @@
     "@types/express": "4.17.13",
     "@types/mocha": "7.0.2",
     "@types/node": "18.11.7",
-    "fastify": "^4.5.3",
+    "fastify": "4.18.0",
     "mocha": "7.2.0",
     "nyc": "15.1.0",
     "rimraf": "5.0.0",