[Web] Minor lang change

data/web/lang/lang.de.json

@@ -761,7 +761,7 @@
         "quick_release_link": "Quick-Release Link öffnen",
         "quick_delete_link": "Quick-Delete Link öffnen",
         "sender": "Sender (SMTP)",
-        "sender_header": "Sender (From-Header)",
+        "sender_header": "Sender (\"From\"-Header)",
         "show_item": "Details",
         "spam_score": "Bewertung",
         "subj": "Betreff",

data/web/lang/lang.en.json

@@ -758,7 +758,7 @@
         "remove": "Remove",
         "rspamd_result": "Rspamd result",
         "sender": "Sender (SMTP)",
-        "sender_header": "Sender (From header)",
+        "sender_header": "Sender (\"From\" header)",
         "quick_release_link": "Open quick release link",
         "quick_delete_link": "Open quick delete link",
         "show_item": "Show item",