[xen master] docs: cmdline: Update serial_tx_buffer default value

[patchbot@xxxxxxx]

commit 71880d7ca4724b360e693535076423f0a4e49879
Author:     Michal Orzel <michal.orzel@xxxxxxx>
AuthorDate: Fri Jun 27 09:06:04 2025 +0200
Commit:     Michal Orzel <michal.orzel@xxxxxxx>
CommitDate: Mon Jun 30 11:50:35 2025 +0200

    docs: cmdline: Update serial_tx_buffer default value
    
    After commit 4df2e99d7314 ("console/serial: set the default transmit
    buffer size in Kconfig"), the default value is set by Kconfig option
    CONFIG_SERIAL_TX_BUFSIZE. Moreover it was bumped to 32KB by commit
    d09e44e5d8fd ("console/serial: bump buffer from 16K to 32K").
    
    Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 docs/misc/xen-command-line.pandoc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/misc/xen-command-line.pandoc 
b/docs/misc/xen-command-line.pandoc
index b0eadd2c5d..6865a61220 100644
--- a/docs/misc/xen-command-line.pandoc
+++ b/docs/misc/xen-command-line.pandoc
@@ -2370,7 +2370,7 @@ accidentally leaking secrets by releasing pages without 
proper sanitization.
 ### serial_tx_buffer
 > `= <size>`
 
-> Default: `16kB`
+> Default: `CONFIG_SERIAL_TX_BUFSIZE`
 
 Set the serial transmit buffer size.
 
--
generated by git-patchbot for /home/xen/git/xen.git#master