MAINTAINERS: fix vendor capitalization (Vmware -> VMware)

"VMware" is the vendor's official spelling.
Adjust the spelling in MAINTAINERS for consistency.

Signed-off-by: Sean Wei <me@sean.taipei>
Message-ID: <20250616.qemu.relocated.03@sean.taipei>
Signed-off-by: Thomas Huth <thuth@redhat.com>

MAINTAINERS

@@ -2538,7 +2538,7 @@ F: net/eth.c
 F: hw/net/net_rx_pkt*
 F: hw/net/net_tx_pkt*
 
-Vmware
+VMware
 M: Dmitry Fleytman <dmitry.fleytman@gmail.com>
 S: Maintained
 F: docs/specs/vmw_pvscsi-spec.rst