doc: note non-monotonic clock in crypto.randomUUIDv7

Signed-off-by: nabeel378 <mohammadnabeeljameel@gmail.com>

Author: nabeel378

doc/api/crypto.md

@@ -5843,8 +5843,9 @@ added: REPLACEME
 Generates a random [RFC 9562][] version 7 UUID. The UUID contains a millisecond
 precision Unix timestamp in the most significant 48 bits, followed by
 cryptographically secure random bits for the remaining fields, making it
-suitable for use as a database key with time-based sorting.
-
+suitable for use as a database key with time-based sorting. The embedded
+timestamp relies on a non-monotonic clock and is not guaranteed to be strictly
+increasing.
 ### `crypto.scrypt(password, salt, keylen[, options], callback)`
 
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