mailmap: Fix Stefan Weil author email

Fix authorship of commits 266aaed~..ac14949. See commit
3bd2608 ("maint: Add .mailmap entries for patches claiming
list authorship") for rationale.

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Stefan Hajnoczi <[email protected]>
Message-Id: <[email protected]>

Author: philmd

.mailmap

@@ -45,6 +45,7 @@ Ed Swierk <[email protected]> Ed Swierk via Qemu-devel <qemu-devel@nong
 Ian McKellar <[email protected]> Ian McKellar via Qemu-devel <[email protected]>
 Julia Suvorova <[email protected]> Julia Suvorova via Qemu-devel <[email protected]>
 Justin Terry (VM) <[email protected]> Justin Terry (VM) via Qemu-devel <[email protected]>
+Stefan Weil <[email protected]> Stefan Weil via <[email protected]>
 
 # Next, replace old addresses by a more recent one.
 Aleksandar Markovic <[email protected]> <[email protected]>