Fix email address in .mailmap (#16017)

Author: cgoldberg

.mailmap

@@ -16,7 +16,7 @@ Brandon Walderman <brwalder@microsoft.com> <bwalderman@outlook.com>
 Brian Burg <bburg@apple.com> <burg@users.noreply.github.com>
 Chethana Paniyadi  <cpaniyad@salesforce.com> <cpaniyad@cpaniyadi-wsl.internal.salesforce.com>
 Craig Nishina <craig.nishina@gmail.com> <cnishina@users.noreply.github.com>
-Corey Goldberg <cgoldberg@gmail.com> <1113081+cgoldberg@users.noreply.github.com>
+Corey Goldberg <1113081+cgoldberg@users.noreply.github.com> <cgoldberg@gmail.com>
 Dan Fabulich <dan@fabulich.com> <dan.fabulich@redfin.com>
 <dfackrell@bluehost.com> <unlearned@gmail.com>
 Daniel P. Purkhús <purkhusid@gmail.com>