Updates readme

README.rst

@@ -31,7 +31,7 @@ The package is available in two different distribution formats:
    version at the git repository, you will need to run a command to recreate
    the backend SQLite file required for its operation. This means that the
    database raw files must be installed somewhere in this case. With option
-   ``a`` you can run in `dummy` mode and only download the raw data files for
+   ``1`` you can run in `dummy` mode and only download the raw data files for
    the database once you are happy with your setup.
 
 You can mix and match points 1/2 and a/b above based on your requirements. Here