Rename trace-model.md to just trace.md

doc/user/runtime/trace_spec.md

@@ -11,7 +11,7 @@ collected in a runtime trace following the specification of this document.
 ## Structure
 
 An ovni runtime trace (or simply, a trace) is composed of one or more
-[streams](../concepts/trace-model.md#stream), which are directories containing
+[streams](../concepts/trace.md#stream), which are directories containing
 two mandatory files:
 
 - `stream.json` the stream metadata in JSON format.

mkdocs.yml

@@ -26,7 +26,7 @@ nav:
     - user/installation.md
     - 'Concepts':
       - user/concepts/part-model.md
-      - user/concepts/trace-model.md
+      - user/concepts/trace.md
     - 'Runtime':
       - user/runtime/index.md
       - user/runtime/env.md