fix: please shellcheck

Author: miampf

image/sysroot-tree/usr/libexec/openssh/sshd-keygen

@@ -27,18 +27,18 @@ if [[ ! -x $KEYGEN ]]; then
 fi
 
 # remove old keys
-rm -f $KEY{,.pub}
+rm -f "$KEY"{,.pub}
 
 # create new keys
-if ! $KEYGEN -q -t $KEYTYPE -f $KEY -C '' -N '' >&/dev/null; then
+if ! $KEYGEN -q -t "$KEYTYPE" -f "$KEY" -C '' -N '' >&/dev/null; then
   exit 1
 fi
 
 # sanitize permissions
-/usr/bin/chmod 600 $KEY
-/usr/bin/chmod 644 $KEY.pub
+/usr/bin/chmod 600 "$KEY"
+/usr/bin/chmod 644 "$KEY".pub
 if [[ -x /usr/sbin/restorecon ]]; then
-  /usr/sbin/restorecon $KEY{,.pub}
+  /usr/sbin/restorecon "$KEY"{,.pub}
 fi
 
 exit 0