fix(deps): update dependency apollo-server-express to v3

Author: renovate-bot

packages/backend/package.json

@@ -30,7 +30,7 @@
     "@nestjs/platform-express": "7.6.18",
     "@nestjs/schematics": "7.3.1",
     "@prisma/client": "2.29.1",
-    "apollo-server-express": "2.25.2",
+    "apollo-server-express": "3.1.2",
     "graphql": "15.5.1",
     "graphql-tools": "7.0.5",
     "mysql": "2.18.1",