[PATCH] docs/devel: Correct uefi-vars-x64 device name

[nanliu <nanliu@redhat.com>]

The documentation for UEFI variable storage in uefi-vars.rst
incorrectly listed the device name as `uefi-vars-x86`.

The correct device name as implemented in the source code is
`uefi-vars-x64`.

This commit updates the documentation to use the correct name,
aligning it with the implementation.

Signed-off-by: Nana Liu <nanliu@redhat.com>
---
 docs/devel/uefi-vars.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/devel/uefi-vars.rst b/docs/devel/uefi-vars.rst
index 0151a26a0a..b4013b5d12 100644
--- a/docs/devel/uefi-vars.rst
+++ b/docs/devel/uefi-vars.rst
@@ -34,7 +34,7 @@ configures the shared buffer location and size, and traps to the host
 to process the requests.
 
 The ``uefi-vars`` device implements the UEFI virtual device.  It comes
-in ``uefi-vars-x86`` and ``uefi-vars-sysbus`` flavours.  The device
+in ``uefi-vars-x64`` and ``uefi-vars-sysbus`` flavours.  The device
 reimplements the handlers needed, specifically
 ``EfiSmmVariableProtocol`` and ``VarCheckPolicyLibMmiHandler``.  It
 also consumes events (``EfiEndOfDxeEventGroup``,
@@ -57,7 +57,7 @@ usage on x86_64
 .. code::
 
    qemu-system-x86_64 \
-      -device uefi-vars-x86,jsonfile=/path/to/vars.json
+      -device uefi-vars-x64,jsonfile=/path/to/vars.json
 
 usage on aarch64
 ----------------
-- 
2.50.1