Merge pull request #38588 from nextcloud/backport/38586/stable27

[stable27] fix(ocp): Mark IMessage::attachInline as @SInCE 27

lib/public/Mail/IMessage.php

@@ -47,7 +47,7 @@ public function attach(IAttachment $attachment): IMessage;
 	 * @param string|null $contentType MIME Content-Type (e.g. text/plain or text/calendar)
 	 *
 	 * @return IMessage
-	 * @since 26.0.0
+	 * @since 27.0.0
 	 */
 	public function attachInline(string $body, string $name, string $contentType = null): IMessage;