Add missing alias to 2.0.2 open files limit doc

Author: erjohnson

content/riak/kv/2.0.2/using/performance/open-files-limit.md

@@ -12,6 +12,7 @@ menu:
 toc: true
 aliases:
   - /riak/2.0.2/ops/tuning/open-files-limit/
+  - /riak/kv/2.0.2/ops/tuning/open-files-limit/
 canonical_link: "https://docs.basho.com/riak/kv/latest/using/performance/open-files-limit"
 ---