md: Replace snprintf with scnprintf
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.10.150 by commit 76694e9ce0b2238c0a5f3ba54f9361dd3770ec78, it was introduced in version v4.10 by commit 766038846e875740cf4c20dfc5d5b292ba47360a. For more details please see the references link.