chore(l10n): update French translations

Currently translated at 100.0% (111 of 111 strings)

Translation: Fossify/Messages
Translate-URL: https://hosted.weblate.org/projects/fossify/sms-messenger/fr/
Via: Weblate

Author: boeng1337

app/src/main/res/values-fr/strings.xml

@@ -122,4 +122,5 @@
     <string name="export_blocked_keywords">Exporter les mots-clés bloqués</string>
     <string name="import_blocked_keywords">Importer des mots clés bloqués</string>
     <string name="keywords">Mots-clés</string>
+    <string name="keep_conversations_archived">Garder les conversations archivées</string>
 </resources>