[CORD-2007]
Update docs site for cord-5.0

Change-Id: I707e3b83951d6e8646052514d28af1a6f0d1e53b
diff --git a/docs/book.json b/docs/book.json
index 19bd59a..662af77 100644
--- a/docs/book.json
+++ b/docs/book.json
@@ -5,7 +5,7 @@
     "summary": "SUMMARY.md"
   },
   "variables": {
-    "branch": "master"
+    "branch": "cord-5.0"
   },
   "plugins": [
     "anchorjs",