Change email pattern for mail.ru

Change email pattern for Mail.ru Group ("@" instead ".")

In issue 1893254 made a mistake in email pattern.

Change-Id: I5e9d0262b8e9e17426c661e0fc8e2f01ba382bc3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899616
Reviewed-by: Xing Liu <xingliu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713595}

AUTHORS

@@ -1077,7 +1077,7 @@ Intel Corporation <*@intel.com>
 LG Electronics, Inc. <*@lge.com>
 Loongson Technology Corporation Limited. <*@loongson.cn>
 Macadamian <*@macadamian.com>
-Mail.ru Group <*.corp.mail.ru>
+Mail.ru Group <*@corp.mail.ru>
 Mediatek <*@mediatek.com>
 Microsoft <*@microsoft.com>
 MIPS Technologies, Inc. <*@mips.com>