fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-OCTOKITREQUESTERROR-8730854
- https://snyk.io/vuln/SNYK-JS-PATHTOREGEXP-8482416

Author: snyk-bot

package.json

@@ -38,7 +38,7 @@
     "debug": "^4.1.1",
     "dotenv": "^10.0.0",
     "minimatch": "^3.0.4",
-    "probot": "^9.3.1",
+    "probot": "^13.4.5",
     "probot-config": "^1.0.1",
     "raven": "^2.6.4"
   },