name of array case sensitive

fix the use of fromemail for testing the email.

endpoints/notifications/sendtestmail.php

@@ -31,7 +31,7 @@
         $smtpPort = $data["smtpport"];
         $smtpUsername = $data["smtpusername"];
         $smtpPassword = $data["smtppassword"];
-        $fromEmail = $data["fromEmail"] ?? "[email protected]";
+        $fromEmail = $data["fromemail"] ?? "[email protected]";
 
         $mail = new PHPMailer(true);
         $mail->isSMTP();