Prepare 2026.10.20 release notes and version bump

Author: jxlarrea

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to Kiosk Satellite are documented here. Full release notes for each version are available on the [releases page](https://github.com/jxlarrea/kiosk-satellite/releases).
 
-## Unreleased
+## v2026.10.20 - 2026-10-10
 
 ### Added
 - **Home Assistant can answer or decline an intercom call.** Two new ESPHome actions per kiosk, intercom_answer and intercom_decline, pick up or turn down the call ringing on that kiosk, the same as its on-screen buttons (#943). A kiosk without a screen can now take calls from a dashboard button, an automation or a sentence spoken to another voice device. Both report an error when nothing is ringing.

app/pubspec.yaml

@@ -2,7 +2,7 @@ name: kiosk_satellite
 description: "Modern kiosk browser for Home Assistant — companion app for Voice Satellite."
 publish_to: 'none'
 
-version: 2026.10.19+317
+version: 2026.10.20+318
 
 environment:
   sdk: ^3.12.2