Build: Update my name in ATHORS.txt

mgol · mgol · commit d2a380759f17 · 2017-08-12T18:23:38.000+02:00
I forgot .mailmap isn't everything.
diff --git a/AUTHORS.txt b/AUTHORS.txt
@@ -184,7 +184,7 @@ Karl Sieburg <ksieburg@yahoo.com>
 Pascal Borreli <pascal@borreli.com>
 Nguyen Phuc Lam <ruado1987@gmail.com>
 Dmitry Gusev <dmitry.gusev@gmail.com>
-Michał Gołębiowski <m.goleb@gmail.com>
+Michał Gołębiowski-Owczarek <m.goleb@gmail.com>
 Li Xudong <istonelee@gmail.com>
 Steven Benner <admin@stevenbenner.com>
 Tom H Fuertes <tomfuertes@gmail.com>
