fix: upgrade ajv from 8.12.0 to 8.13.0

Snyk has created this PR to upgrade ajv from 8.12.0 to 8.13.0.

See this package in npm:
ajv

See this project in Snyk:
https://app.snyk.io/org/ashishkaushik/project/1c8837ad-9a1d-4804-8706-28f21c2a08cf?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -139,7 +139,7 @@
   "dependencies": {
     "@loopback/context": "^7.0.0",
     "@loopback/core": "^6.0.0",
-    "ajv": "^8.11.0",
+    "ajv": "^8.13.0",
     "https-proxy-agent": "^5.0.0",
     "jsonwebtoken": "^9.0.0",
     "passport": "^0.7.0",