Update my e-mail address

Christian Kauhaus · Christian Kauhaus · commit 18cf038d6f62 · 2018-01-09T12:09:36.000+01:00
My work address is more appropriate now.
diff --git a/lib/maintainers.nix b/lib/maintainers.nix
@@ -127,7 +127,7 @@
   ciil = "Simon Lackerbauer <simon@lackerbauer.com>";
   ck3d = "Christian Kögler <ck3d@gmx.de>";
   ckampka = "Christian Kampka <christian@kampka.net>";
-  ckauhaus = "Christian Kauhaus <christian@kauhaus.de>";
+  ckauhaus = "Christian Kauhaus <kc@flyingcircus.io>";
   cko = "Christine Koppelt <christine.koppelt@gmail.com>";
   cleverca22 = "Michael Bishop <cleverca22@gmail.com>";
   cmcdragonkai = "Roger Qiu <roger.qiu@matrix.ai>";
