docs: update kong.yaml to include new properties

decK doesn't inject defaults for these properties as a user could be
running a version of Kong which doesn't include these properties.

In future, as Kong Ingress Controller does, these properties could be
auto-magically inserted based on the version of Kong and Kong
Enterprise.

kong.yaml

@@ -9,25 +9,29 @@ services:
   - team-svc1
   routes:
   - name: r1
+    https_redirect_status_code: 301
     paths:
     - /r1
 - name: svc2
   host: mockbin.org
   routes:
   - name: r2
+    https_redirect_status_code: 301
     paths:
     - /r2
 - name: svc3
   host: mockbin.org
   port: 80
   routes:
   - name: r3
+    https_redirect_status_code: 301
     paths:
     - /r3
     methods:
     - GET
 upstreams:
 - name: upstream1
+  algorithm: round-robin
   targets:
   - target: 198.51.100.11:80
   - target: 198.51.100.12:80