Change 2fa mail pattern to replace code

application/src/main/java/org/thingsboard/server/service/mail/DefaultMailService.java

@@ -316,7 +316,7 @@ public class DefaultMailService implements MailService {
         String subject = messages.getMessage("2fa.verification.code.subject", null, Locale.US);
         String message = mergeTemplateIntoString("2fa.verification.code.ftl", Map.of(
                 TARGET_EMAIL, email,
-                "verificationCode", verificationCode,
+                "сode", verificationCode,
                 "expirationTimeSeconds", expirationTimeSeconds
         ));
 

application/src/main/resources/templates/2fa.verification.code.ftl

@@ -76,7 +76,7 @@
                                 </tr>
                                 <tr style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;">
                                     <td class="content-block" style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; color: #348eda; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;" valign="top" align="center">
-                                        <h2 style="margin-top: 8px;">${verificationCode}</h2>
+                                        <h2 style="margin-top: 8px;">${сode}</h2>
                                     </td>
                                 </tr>
                                 <tr style="font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0;">