Update dependency @apollo/gateway to v2 [SECURITY]

Author: renovate[bot]

service-gateway/package.json

@@ -10,7 +10,7 @@
   "author": "Christoph Benjamin Weber",
   "license": "MIT",
   "dependencies": {
-    "@apollo/gateway": "^0.29.0",
+    "@apollo/gateway": "^2.0.0",
     "apollo-server": "^2.6.3",
     "esm": "^3.2.25",
     "graphql": "^14.7.0"