Fix AsyncAPI examples to use actual partition name 'app' not 'firmware'

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: BrentIO

Controller/asyncapi.yaml

@@ -1166,15 +1166,15 @@ components:
             installed_version: "2026.04.01"
             latest_version: "2026.06.21"
             release_url: "https://github.com/BrentIO/FireFly-Controller/releases/tag/2026.06.21"
-            title: "Updating Firmware"
+            title: "Updating App"
             in_progress: true
             update_percentage: 67
         - name: forced-in-progress
           summary: Forced OTA install — same installed and target version
           payload:
             installed_version: "2026.06.21"
             latest_version: "2026.06.21 (Forced)"
-            title: "Updating Firmware"
+            title: "Updating App"
             in_progress: true
             update_percentage: 42
         - name: failed
@@ -1420,10 +1420,10 @@ components:
           type: string
           description: >
             Label indicating which partition is currently being flashed,
-            e.g. "Updating Firmware" or "Updating UI". Present only when
+            e.g. "Updating App" or "Updating UI". Present only when
             in_progress is true.
           examples:
-            - "Updating Firmware"
+            - "Updating App"
             - "Updating UI"
         in_progress:
           type: boolean