[PATCH] qemu-docs: Update options for graphical frontends

[Yihuan Pan]

The command line options `-ctrl-grab` and `-alt-grab` have been removed
in QEMU 7.1. Instead, use the `-display sdl,grab-mod=<modifiers>` option
to specify the grab modifiers.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2103
Signed-off-by: Yihuan Pan <xun794@gmail.com>
---
 docs/system/keys.rst.inc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/docs/system/keys.rst.inc b/docs/system/keys.rst.inc
index bd9b8e5f6f..44698e301e 100644
--- a/docs/system/keys.rst.inc
+++ b/docs/system/keys.rst.inc
@@ -1,7 +1,8 @@
 During the graphical emulation, you can use special key combinations to
 change modes. The default key mappings are shown below, but if you use
-``-alt-grab`` then the modifier is Ctrl-Alt-Shift (instead of Ctrl-Alt)
-and if you use ``-ctrl-grab`` then the modifier is the right Ctrl key
+``-display sdl,grab-mod=lshift-lctrl-lalt`` then the modifier is
+Ctrl-Alt-Shift(instead of Ctrl-Alt) and if you use
+``-display sdl,grab-mod=rctrl`` then the modifier is the right Ctrl key
 (instead of Ctrl-Alt):
 
 Ctrl-Alt-f
-- 
2.43.0