Updated readme make fil;e and fixed bug with NM perms when not existing

config/hooks/normal/0091-UpdateNetworkManagerPerms.chroot

@@ -1,3 +1,6 @@
 #!/bin/bash
-#Set perrmissons for saved networks in NetworkManager
-chmod 600 /etc/NetworkManager/system-connections/*.nmconnection
+#Set perrmissons for saved networks in NetworkManager, if configs exist
+
+if ls /etc/NetworkManager/system-connections/*.nmconnection 1> /dev/null 2>&1 ; then
+    chmod 600 /etc/NetworkManager/system-connections/*.nmconnection
+fi