doc: update sxa's email address to Red Hat from IBM

Signed-off-by: Stewart Addison <[email protected]>

PR-URL: #35442
Reviewed-By: Harshitha K P <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Ash Cripps <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: Stewart Addison

.mailmap

@@ -371,8 +371,9 @@ Stefan Bühler <[email protected]>
 Stephen Belanger <[email protected]> <[email protected]>
 Steve Mao <[email protected]> <[email protected]>
 Steven R. Loomis <[email protected]> <[email protected]>
-Stewart X Addison <[email protected]> Stewart Addison <[email protected]>
-Stewart X Addison <[email protected]> sxa555 <[email protected]>
+Stewart X Addison <[email protected]> Stewart Addison <[email protected]>
+Stewart X Addison <[email protected]> sxa555 <[email protected]>
+Stewart X Addison <[email protected]> Stewart X Addison <[email protected]>
 Suraiya Hameed <[email protected]> suraiyah <[email protected]>
 Suramya shah <[email protected]> ss22ever <[email protected]>
 Surya Panikkal <[email protected]> surya panikkal <[email protected]>

README.md

@@ -415,7 +415,7 @@ For information about the governance of the Node.js project, see
 * [starkwang](https://github.com/starkwang) -
 **Weijia Wang** <[email protected]>
 * [sxa](https://github.com/sxa) -
-**Stewart X Addison** <sxa@uk.ibm.com>
+**Stewart X Addison** <sxa@redhat.com> (he/him)
 * [targos](https://github.com/targos) -
 **Michaël Zasso** <[email protected]> (he/him)
 * [TimothyGu](https://github.com/TimothyGu) -