doc/git-mailrc: correct entry 'agraf'

Correct Alex's email address.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Alexander Graf <agraf@csgraf.de>
diff --git a/doc/git-mailrc b/doc/git-mailrc
index c2eee8c..b75ebab 100644
--- a/doc/git-mailrc
+++ b/doc/git-mailrc
@@ -15,7 +15,7 @@
 alias abrodkin       Alexey Brodkin <alexey.brodkin@synopsys.com>
 alias afleming       Andy Fleming <afleming@gmail.com>
 alias ag             Anatolij Gustschin <agust@denx.de>
-alias agraf          Alexander Graf <agraf@suse.de>
+alias agraf          Alexander Graf <agraf@csgraf.de>
 alias alisonwang     Alison Wang <alison.wang@nxp.com>
 alias angelo_ts      Angelo Dureghello <angelo@sysam.it>
 alias bmeng          Bin Meng <bmeng.cn@gmail.com>