docs/composability: ran prettier + added to mkdocs.yml

docs/plugins/composability.md

@@ -254,10 +254,9 @@ const headerLinkRouteRef = createExternalRouteRef();
 ### Binding External Routes in the App
 
 The association of external routes is controlled by the app. Each
-`ExternalRouteRef` of a plugin should be bound to an actual `RouteRef`,
-usually from another plugin. The binding process happens once at app startup,
-and is then used through the lifetime of the app to help resolve concrete route
-paths.
+`ExternalRouteRef` of a plugin should be bound to an actual `RouteRef`, usually
+from another plugin. The binding process happens once at app startup, and is
+then used through the lifetime of the app to help resolve concrete route paths.
 
 Using the above example of the `BarPage` linking to the `FooPage`, we might do
 something like this in the app:

mkdocs.yml

@@ -66,6 +66,7 @@ nav:
       - Creating a new plugin: 'plugins/create-a-plugin.md'
       - Developing a plugin: 'plugins/plugin-development.md'
       - Structure of a plugin: 'plugins/structure-of-a-plugin.md'
+      - Composability System Migration: 'plugins/composability.md'
       - Backends and APIs:
           - Proxying: 'plugins/proxying.md'
           - Backstage backend plugin: 'plugins/backend-plugin.md'