docs: update comment for subuid/subgid

scripts/src/system.py

@@ -149,7 +149,8 @@ def show(path: str, show_ignored: bool) -> None:
                 r"/etc/.pwd.lock",
                 # contains DNS config used by various programs, managed by systemd-resolved
                 r"/etc/resolv.conf",
-                # saves subuids and subgids, I don't want this as persistent state
+                # saves subuid and subgid ranges, I don't want this as persistent state
+                # instead define using option `subUidRanges`/`subGidRanges` where desired
                 r"/etc/subgid",
                 r"/etc/subuid",
                 # auto-generated by CUPS for compatibility