Update `.mailmap` (#7578)

Marshall Bowers created 

This PR updates the `.mailmap` file to merge some commit authors using
multiple emails.

Release Notes:

- N/A

Change summary

.mailmap | 4 ++++
1 file changed, 4 insertions(+)

Detailed changes

.mailmap 🔗 

@@ -13,6 +13,8 @@ Antonio Scandurra <me@as-cii.com>
 Antonio Scandurra <me@as-cii.com> <antonio@zed.dev>
 Conrad Irwin <conrad@zed.dev>
 Conrad Irwin <conrad@zed.dev> <conrad.irwin@gmail.com>
+Greg Morenz <greg-morenz@droid.cafe>
+Greg Morenz <greg-morenz@droid.cafe> <morenzg@gmail.com>
 Joseph T. Lyons <JosephTLyons@gmail.com>
 Joseph T. Lyons <JosephTLyons@gmail.com> <JosephTLyons@users.noreply.github.com>
 Julia <floc@unpromptedtirade.com>
@@ -39,6 +41,8 @@ Nathan Sobo <nathan@zed.dev> <nathan@warp.dev>
 Nathan Sobo <nathan@zed.dev> <nathansobo@gmail.com>
 Piotr Osiewicz <piotr@zed.dev>
 Piotr Osiewicz <piotr@zed.dev> <24362066+osiewicz@users.noreply.github.com>
+Robert Clover <git@clo4.net>
+Robert Clover <git@clo4.net> <robert@clover.gdn>
 Thorsten Ball <thorsten@zed.dev>
 Thorsten Ball <thorsten@zed.dev> <me@thorstenball.com>
 Thorsten Ball <thorsten@zed.dev> <mrnugget@gmail.com>