remote: fix typo

The mapping that describe what ref fetched from the remote is used to
update what ref locally is called "refspec", not "respec".

Signed-off-by: Ralf Thielow <ralf.thielow@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/remote.c

@@ -674,7 +674,7 @@ static int mv(int argc, const char **argv)
 				      strlen(rename.old), rename.new,
 				      strlen(rename.new));
 		} else
-			warning(_("Not updating non-default fetch respec\n"
+			warning(_("Not updating non-default fetch refspec\n"
 				  "\t%s\n"
 				  "\tPlease update the configuration manually if necessary."),
 				buf2.buf);