Update harbor.md

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Closes big-bang/product/packages/harbor#104 (closed)

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docs/understanding-bigbang/package-architecture/harbor.md

@@ -31,7 +31,7 @@ graph LR
 
   subgraph "Logging"
     harborpods("Harbor Pods") --> fluent(Fluentbit) --> logging-ek-es-http
-    logging-ek-es-http{{Elastic Service<br />logging-ek-es-http}} --> elastic[(Elastic Storage)]
+    logging-ek-es-http{{Elastic Service<br />logging-ek-es-http}} --> plg[(PLG Storage)]
   end
 
   subgraph "Monitoring"
@@ -40,6 +40,8 @@ graph LR
   end
 ```
 
+
+
 For more information on the Harbor architecture, see [Harbor Overview and Architecture](https://github.com/goharbor/harbor/wiki/Architecture-Overview-of-Harbor).
 
 ## Harbor Touch Points