Update UUID documentation with RFC9562 links

RFC9562 was released almost two weeks ago, so we can replace the "draft"
UUIDv7 URL with the final RFC URL too.  RFC9562 obsoletes RFC4122, so I
replaced its link as well.

lib/random/formatter.rb

@@ -165,7 +165,7 @@ def urlsafe_base64(n=nil, padding=false)
   #
   # The result contains 122 random bits (15.25 random bytes).
   #
-  # See RFC4122[https://www.rfc-editor.org/rfc/rfc4122] for details of UUID.
+  # See RFC9562[https://www.rfc-editor.org/rfc/rfc9562] for details of UUIDv4.
   #
   def uuid
     ary = random_bytes(16)
@@ -204,8 +204,7 @@ def uuid
   # Note that this method cannot be made reproducible because its output
   # includes not only random bits but also timestamp.
   #
-  # See draft-ietf-uuidrev-rfc4122bis[https://datatracker.ietf.org/doc/draft-ietf-uuidrev-rfc4122bis/]
-  # for details of UUIDv7.
+  # See RFC9562[https://www.rfc-editor.org/rfc/rfc9562] for details of UUIDv7.
   #
   # ==== Monotonicity
   #
@@ -242,7 +241,7 @@ def uuid
   #
   # Counters and other mechanisms for stronger guarantees of monotonicity are
   # not implemented.  Applications with stricter requirements should follow
-  # {Section 6.2}[https://www.ietf.org/archive/id/draft-ietf-uuidrev-rfc4122bis-07.html#monotonicity_counters]
+  # {Section 6.2}[https://www.rfc-editor.org/rfc/rfc9562.html#name-monotonicity-and-counters]
   # of the specification.
   #
   def uuid_v7(extra_timestamp_bits: 0)