git-config.txt: fix a typo

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-config.txt

diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
index 28e1861..19a8917 100644
--- a/Documentation/git-config.txt
+++ b/Documentation/git-config.txt
@@ -279,7 +279,7 @@
 % git config --get-all core.gitproxy
 ------------
 
-If you like to live dangerous, you can replace *all* core.gitproxy by a
+If you like to live dangerously, you can replace *all* core.gitproxy by a
 new one with
 
 ------------