Adds relayout option to CustomMultiChildLayout. (#39252)

AUTHORS

diff --git a/AUTHORS b/AUTHORS
index 2a36d97..01ec32a 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -40,4 +40,5 @@
 Martin Staadecker <machstg@gmail.com>
 Igor Katsuba <katsuba.igor@gmail.com>
 Diego Velásquez <diego.velasquez.lopez@gmail.com>
-Sarbagya Dhaubanjar <mail@sarbagyastha.com.np>
\ No newline at end of file
+Simon Lightfoot <simon@devangels.london>
+Sarbagya Dhaubanjar <mail@sarbagyastha.com.np>