mailmap: update entry for Sriram Yagnaraman

Link my old est.tech address to my active mail address
Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@ericsson.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Link: https://patch.msgid.link/20240828072417.4111996-1-sriram.yagnaraman@ericsson.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

.mailmap

@@ -614,6 +614,7 @@ Simon Kelley <simon@thekelleys.org.uk>
 Sricharan Ramabadhran <quic_srichara@quicinc.com> <sricharan@codeaurora.org>
 Srinivas Ramana <quic_sramana@quicinc.com> <sramana@codeaurora.org>
 Sriram R <quic_srirrama@quicinc.com> <srirrama@codeaurora.org>
+Sriram Yagnaraman <sriram.yagnaraman@ericsson.com> <sriram.yagnaraman@est.tech>
 Stanislav Fomichev <sdf@fomichev.me> <sdf@google.com>
 Stefan Wahren <wahrenst@gmx.net> <stefan.wahren@i2se.com>
 Stéphane Witzmann <stephane.witzmann@ubpmes.univ-bpclermont.fr>