Added umask

Some people use umask 077 (like me), and it doesn't seem to work. I tried with umask 022 and it worked just fine, so I think we should set the default umask in the script. It would be nice if we can figure out something stricter than 022 as well.

PVEDiscordDark.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 # https://github.com/Weilbyte/PVEDiscordDark
 
+umask 022
+
 #region Consts
 RED='\033[0;31m'
 BRED='\033[0;31m\033[1m'