MAINTAINERS: Add Sriram Yagnaraman as a igb reviewer

I would like to review and be informed on changes to igb device

Signed-off-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
Signed-off-by: Jason Wang <jasowang@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 34b50b2..ef45b5e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2252,6 +2252,7 @@
 
 igb
 M: Akihiko Odaki <akihiko.odaki@daynix.com>
+R: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
 S: Maintained
 F: docs/system/devices/igb.rst
 F: hw/net/igb*