mailmap: Update Sasha Finkelstein's email address

Add mailmap entry

Signed-off-by: Sasha Finkelstein <k@chaosmail.tech>
Link: https://patch.msgid.link/20260411-mailmap-v1-1-5a519f7b00b5@chaosmail.tech
Signed-off-by: Sven Peter <sven@kernel.org>

Author: WhatAmISupposedToPutHere

.mailmap

@@ -733,6 +733,7 @@ Sarangdhar Joshi <spjoshi@codeaurora.org>
 Saravana Kannan <saravanak@kernel.org> <skannan@codeaurora.org>
 Saravana Kannan <saravanak@kernel.org> <saravanak@google.com>
 Sascha Hauer <s.hauer@pengutronix.de>
+Sasha Finkelstein <k@chaosmail.tech> <fnkl.kernel@gmail.com>
 Sahitya Tummala <quic_stummala@quicinc.com> <stummala@codeaurora.org>
 Sathishkumar Muruganandam <quic_murugana@quicinc.com> <murugana@codeaurora.org>
 Satya Priya <quic_skakitap@quicinc.com> <quic_c_skakit@quicinc.com> <skakit@codeaurora.org>

MAINTAINERS

@@ -8669,7 +8669,7 @@ F:	include/linux/host1x.h
 F:	include/uapi/drm/tegra_drm.h
 
 DRM DRIVERS FOR PRE-DCP APPLE DISPLAY OUTPUT
-M:	Sasha Finkelstein <fnkl.kernel@gmail.com>
+M:	Sasha Finkelstein <k@chaosmail.tech>
 R:	Janne Grunau <j@jannau.net>
 L:	dri-devel@lists.freedesktop.org
 L:	asahi@lists.linux.dev