chore(deps): update dependency cloudevents to v9 (#691)

Author: renovate-bot

package-lock.json

@@ -21,7 +21,7 @@
   "dependencies": {
     "@types/express": "^4.17.21",
     "body-parser": "1.20.3",
-    "cloudevents": "^8.0.2",
+    "cloudevents": "^9.0.0",
     "express": "^4.21.2",
     "minimist": "^1.2.8",
     "on-finished": "^2.3.0",