MAINTAINERS: Update Alex Williamson's email address

Switch to a personal email account as I'll be leaving Red Hat soon.

Signed-off-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20251013153543.3091169-1-alex.williamson@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

.mailmap

@@ -74,6 +74,7 @@ Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> <aleksandar.markovic@imgte
 Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> <amarkovic@wavecomp.com>
 Aleksandar Rikalo <aleksandar.rikalo@syrmia.com> <arikalo@wavecomp.com>
 Aleksandar Rikalo <aleksandar.rikalo@syrmia.com> <aleksandar.rikalo@rt-rk.com>
+Alex Williamson <alex@shazbot.org> <alex.williamson@redhat.com>
 Alexander Graf <agraf@csgraf.de> <agraf@suse.de>
 Ani Sinha <anisinha@redhat.com> <ani@anisinha.ca>
 Anthony Liguori <anthony@codemonkey.ws> Anthony Liguori <aliguori@us.ibm.com>

MAINTAINERS

@@ -2285,7 +2285,7 @@ S: Maintained
 F: hw/usb/dev-serial.c
 
 VFIO
-M: Alex Williamson <alex.williamson@redhat.com>
+M: Alex Williamson <alex@shazbot.org>
 M: Cédric Le Goater <clg@redhat.com>
 S: Supported
 F: hw/vfio/*
@@ -2297,7 +2297,7 @@ F: migration/vfio-stub.c
 F: tests/functional/aarch64/test_device_passthrough.py
 
 vfio-igd
-M: Alex Williamson <alex.williamson@redhat.com>
+M: Alex Williamson <alex@shazbot.org>
 M: Cédric Le Goater <clg@redhat.com>
 M: Tomita Moeko <tomitamoeko@gmail.com>
 S: Supported