Update dependency apollo-server-express to v3

Author: renovate[bot]

packages/backend/package.json

@@ -69,7 +69,7 @@
     "@nestjs/serve-static": "2.2.2",
     "@nestjs/swagger": "5.2.1",
     "@sendgrid/mail": "7.7.0",
-    "apollo-server-express": "2.26.1",
+    "apollo-server-express": "3.11.1",
     "boolean": "3.2.0",
     "class-transformer": "0.5.1",
     "class-validator": "0.13.2",