chore: translate release notes to English

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

.github/workflows/release.yml

@@ -106,11 +106,11 @@ jobs:
           body: |
             ## Postiz Mobile ${{ github.ref_name }}
 
-            APK signé pour Android — installation directe (sideload).
+            Signed APK for Android — direct install (sideload).
 
             ### Installation
-            1. Activer "Sources inconnues" sur l'appareil
-            2. Transférer l'APK et ouvrir pour installer
+            1. Enable "Unknown sources" on the device
+            2. Transfer the APK to the device and open it to install
           files: ${{ steps.apk.outputs.path }}
           draft: false
           prerelease: ${{ contains(github.ref_name, '-') }}