Lightning talk on submit requirements: speaker changed to Luca

Youssef has a commitment this week and won't be able to attend
and deliver the presentation. Luca will present Youssef's slides.

Change-Id: Ibbbfe6cbc61897ec456d14abb7e48467a3357b77

sessions/submit-requirements.md

diff --git a/sessions/submit-requirements.md b/sessions/submit-requirements.md
index 3bc23d2..a5dece1 100644
--- a/sessions/submit-requirements.md
+++ b/sessions/submit-requirements.md
@@ -17,4 +17,4 @@
 
 This talk will be presented online.
 
-*[Youssef Elghareeb, Google](../speakers.md#ghareeb)*
+*[Luca Milanesio, GerritForge](../speakers.md#lmilanesio)*
\ No newline at end of file