Update dependency probot to v12 [SECURITY]

Author: renovate[bot]

server/package.json

@@ -17,7 +17,7 @@
     "lodash": "^4.17.15",
     "object-hash": "^2.0.1",
     "prisma2": "^2.0.0-preview018",
-    "probot": "9.6.6"
+    "probot": "12.3.3"
   },
   "devDependencies": {
     "@types/algoliasearch": "3.34.7",