MM-19310 - Wrong validation message when Bot name ends in a . (#12905)

* MM-19310 - Wrong validation message when Bot name ends in a .

* Reverting back old behaviour

model/bot.go

@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"strings"
 	"unicode/utf8"
 )
 
@@ -167,7 +166,7 @@ func UserFromBot(b *Bot) *User {
 	return &User{
 		Id:        b.UserId,
 		Username:  b.Username,
-		Email:     fmt.Sprintf("%s@localhost", strings.ToLower(b.Username)),
+		Email:     NormalizeEmail(fmt.Sprintf("%s@localhost", b.Username)),
 		FirstName: b.DisplayName,
 		Roles:     SYSTEM_USER_ROLE_ID,
 	}