image fix

Author: jaimejim

draft-ietf-core-coap-pubsub.md

@@ -128,18 +128,18 @@ The broker is responsible for the store-and-forward of state update representati
 ~~~~ aasvg
      CoAP                      CoAP                 CoAP
      clients                  server                clients
-   .-----------.          .----------.  observe  .-----------.
-   |           | publish  |          |<----------+           |
-   | publisher +--------->+          +---------->| subscribe |
-   |           |          |          +---------->|           |
-   '-----------'          |          |           '-----------'
+   .-----------.          .----------.  observe  .------------.
+   |           | publish  |          |<----------+            |
+   | publisher +--------->+          +---------->| subscriber |
+   |           |          |          +---------->|            |
+   '-----------'          |          |           '------------'
         ...               |  broker  |                ...
         ...               |          |                ...
-   .-----------.          |          |  observe  .-----------.
-   |           | publish  |          |<----------+           |
-   | publisher +--------->|          +---------->| subscribe |
-   |           |          |          +---------->|           |
-   '-----------'          '----------'           '-----------'
+   .-----------.          |          |  observe  .------------.
+   |           | publish  |          |<----------+            |
+   | publisher +--------->|          +---------->| subscriber |
+   |           |          |          +---------->|            |
+   '-----------'          '----------'           '------------'
 ~~~~
 {: #fig-arch title='Publish-subscribe architecture over CoAP' artwork-align="center"}