fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-EXPRESS-14157151

Author: snyk-bot

package.json

@@ -17,7 +17,7 @@
     "body-parser": "^1.20.1",
     "cloudevents": "^8.0.0",
     "debug": "^4.3.4",
-    "express": "^4.18.2",
+    "express": "^4.22.0",
     "express-interceptor": "^1.2.0",
     "http-terminator": "^3.2.0",
     "lodash": "^4.17.21",