Update docs.yml for 2.17.0 release

Author: Bret McGuire

docs.yaml

@@ -68,6 +68,8 @@ rules:
   use_path_nav_files_only: true
 
 versions:
+  - name: "2.17"
+    ref: 2.17.0
   - name: "2.16"
     ref: 698a1b01801ddf150d9f8793faa8548877f5f7f5
   - name: "2.15"