[doc] update stbuehler address

stbuehler · stbuehler · commit 28c905629ae4 · 2023-07-12T01:59:43.000+02:00
diff --git a/AUTHORS b/AUTHORS
@@ -3,5 +3,5 @@ Elan Ruusamäe <glen@delfi.ee>
 Marcus Rückert <darix@opensu.se>
 mOo <moo.lighttpd@gmail.com>
 Robert Jakabosky <bobby@neoawareness.com>
-Stefan Bühler <stbuehler@web.de>
+Stefan Bühler <source@stbuehler.de>
 Glenn Strauss <gstrauss@gluelogic.com>
