Fix env docs comment

Signed-off-by: Terekhin Alexandr <alex@bearns.me>

main.go

@@ -10,9 +10,9 @@ import (
 func main() {
 	var (
 		port      = os.Getenv("PORT")       // Bot app listening port, same as port in API_URL
-		publicURL = os.Getenv("PUBLIC_URL") // http://<telegram-api-server>:<port>
+		publicURL = os.Getenv("PUBLIC_URL") // http://<bot-app-host>:<bot-app-port>/<random-name-path>
 		token     = os.Getenv("TOKEN")      // Token from @BotFather
-		apiURL    = os.Getenv("API_URL")    // http://<bot-app-host>:<bot-app-port>/<random-name-path>
+		apiURL    = os.Getenv("API_URL")    // http://<telegram-api-server>:<port>
 	)
 
 	webhook := &tb.Webhook{