fixup: reword uname header

Author: nasamuffin

bugreport.c

@@ -34,7 +34,7 @@ static void get_system_info(struct strbuf *sys_info)
 	strbuf_complete_line(sys_info);
 
 	/* system call for other version info */
-	strbuf_addstr(sys_info, "uname -a: ");
+	strbuf_addstr(sys_info, "uname: ");
 	if (uname(&uname_info))
 		strbuf_addf(sys_info, "uname() failed with code %d\n", errno);
 	else