mailmap: remap cafkafk

I've managed to fill the git logs with several broken
identities (sorry). This makes sure that they all refer to a single,
accurate and reachable one.

Signed-off-by: Christina Sørensen <christina@cafkafk.com>

.mailmap

@@ -1,6 +1,9 @@
 ajs124 <git@ajs124.de> <ajs124@users.noreply.github.com>
 Anderson Torres <torres.anderson.85@protonmail.com>
 Atemu <git@atemu.net> <atemu.main@gmail.com>
+Christina Sørensen <christina@cafkafk.com>
+Christina Sørensen <christina@cafkafk.com> <christinaafk@gmail.com>
+Christina Sørensen <christina@cafkafk.com> <89321978+cafkafk@users.noreply.github.com>
 Daniel Løvbrøtte Olsen <me@dandellion.xyz> <daniel.olsen99@gmail.com>
 Fabian Affolter <mail@fabian-affolter.ch> <fabian@affolter-engineering.ch>
 goatastronaut0212 <goatastronaut0212@outlook.com> <goatastronaut0212@proton.me>