docs(graphql-cookbook): Update Apollo Client

Author: Urigo

public/docs/_examples/package.json

@@ -27,7 +27,7 @@
     "@angular/upgrade": "~4.0.0",
     "angular-in-memory-web-api": "~0.3.1",
     "apollo-angular": "^0.12.0",
-    "apollo-client": "^1.0.0-rc.5",
+    "apollo-client": "^1.0.0-rc.6",
     "apollo-test-utils": "^0.2.1",
     "core-js": "^2.4.1",
     "graphql": "^0.9.1",