fixup! Provide the proper language to the mailer

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

lib/public/Mail/IEMailTemplate.php

@@ -140,10 +140,11 @@ public function addBodyButton(string $text, string $url, $plainText = '');
 	 * Adds a logo and a text to the footer. <br> in the text will be replaced by new lines in the plain text email
 	 *
 	 * @param string $text If the text is empty the default "Name - Slogan<br>This is an automatically sent email" will be used
+	 * @param string $lang Optional language to set the default footer in
 	 *
 	 * @since 12.0.0
 	 */
-	public function addFooter(string $text = '');
+	public function addFooter(string $text = '', string $lang = null);
 
 	/**
 	 * Returns the rendered email subject as string