doc: regenerate man pages from the v1.3.0 binaries

Previously the version strings were restamped by hand in af7d9e230 because
help2man and a built binary were both unavailable. Regenerated properly via
util/gen-manpages.sh against freshly built v1.3.0 binaries, which also picks
up two options that were never documented:

  -sietch-min-zouts=<n>   decoy Sapling outputs added to each z_sendmany
  -stratumtarget=<hex>    pool share target, for solo/low-difficulty mining

NOTE: the version lines read "v1.3.0-af7d9e230" because `git describe` has
no annotated tag to find yet. Once v1.3.0 is tagged annotated, these must be
regenerated once more so they read a clean "v1.3.0" -- that step stays open
on the release checklist.

Generated on seed 176 (glibc 2.35 runs the binaries; help2man is installed
there and not on the primary), with an isolated HOME so nothing touched the
node's datadir. The reindex running on that box was not disturbed.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FU87LdsJZiZkfq1eXubpeo

doc/man/dragonx-tx.1

@@ -3,7 +3,7 @@
 .SH NAME
 dragonx-tx \- manual page for dragonx-tx v1.3.0
 .SH DESCRIPTION
-hush\-tx utility version v1.3.0
+hush\-tx utility version v1.3.0\-af7d9e230
 .SS "Usage:"
 .TP
 hush\-tx [options] <hex\-tx> [commands]