README.org: Update quickstart source file position

Author: maramon

README.org

@@ -54,7 +54,7 @@ Index the RTags project, and wait until =rdm= is silent
 Open source file in =emacs=
 
 #+BEGIN_SRC sh
-emacs +73:34 src/rdm.cpp
+emacs +74:34 src/rdm.cpp
 #+END_SRC
 
 Load =rtags.el=