chore: trigger rebuild for upstream eac11e0; correct README rebuild note

The workflow ignores README pushes, so the previous note was wrong.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018jkHZhr7ZzHGGuE2bJQmGa

scripts/make-flatpak.sh

@@ -72,3 +72,5 @@ flatpak build-export --disable-sandbox repo build-dir "$BRANCH"
 flatpak build-update-repo repo --title="HeiniRemote Agent" --prune --prune-depth=1
 
 echo ">> done: ./repo"
+
+# Touched to trigger a rebuild against upstream eac11e0 (2026-09-21).