docs: add repeater-mqtt-eastmesh-v1.3.3 release notes

release-notes.yml

@@ -251,7 +251,7 @@ releases:
     tag: "repeater-mqtt-eastmesh-v1.3.3"
     date: "2026-04-17"
     previous_version: "1.3.2"
-    summary: "Improved /stats memory visibility, tightened web stats startup on 2 MB-class PSRAM boards, and polished the local repeater admin UI."
+    summary: "Improved /stats memory visibility, tightened web stats startup on 2 MB-class PSRAM boards, polished the local repeater admin UI, and pulled in a high-level upstream MeshCore sync."
     changes:
       - type: fixed
         area: stats
@@ -268,6 +268,9 @@ releases:
       - type: changed
         area: web-panel
         text: "Changed the local web panel tab title to use the repeater name when available, with a fallback to `Repeater Config`."
+      - type: changed
+        area: upstream
+        text: "Synced with newer upstream MeshCore `dev` changes, including region/default-scope CLI support, companion default-scope handling, board/platform updates, and refreshed upstream documentation."
       - type: docs
         area: web-panel
         text: "Updated the web panel docs to describe the rough 2 MB PSRAM boot-history cutoff."