[Web] Add new lang strings

data/web/lang/lang.de.json

@@ -783,6 +783,7 @@
         "release_body": "Die ursprüngliche Nachricht wurde als EML-Datei im Anhang hinterlegt.",
         "release_subject": "Potentiell schädliche Nachricht aus Quarantäne: %s",
         "remove": "Entfernen",
+        "rewrite_subject": "Betreff geändert",
         "rspamd_result": "Rspamd Ergebnis",
         "quick_release_link": "Quick-Release Link öffnen",
         "quick_delete_link": "Quick-Delete Link öffnen",

data/web/lang/lang.en.json

@@ -783,6 +783,7 @@
         "release_body": "We have attached your message as eml file to this message.",
         "release_subject": "Potentially damaging quarantine item %s",
         "remove": "Remove",
+        "rewrite_subject": "Rewrite subject",
         "rspamd_result": "Rspamd result",
         "sender": "Sender (SMTP)",
         "sender_header": "Sender (\"From\" header)",