`fdroid init` in README.md#quickstart

See https://forum.f-droid.org/t/cannot-use-fdroid-init-on-windows-10-bash/3153

https://gitlab.com/fdroid/fdroiddata/blob/master/README.md#quickstart directions:

Clone fdroiddata (or your fork) and enter it:
git clone https://gitlab.com/fdroid/fdroiddata.git
cd fdroiddata
Optionally create a base config.py and signing keys with:
fdroid init

Result:
pwd

/F-Droid/fdroiddata

fdroid init

-bash: fdroid: command not found

./fdroid init

-bash: ./fdroid: No such file or directory

Change https://gitlab.com/fdroid/fdroiddata/blob/master/README.md#quickstart directions:

Clone fdroiddata (or your fork) and enter it:
git clone https://gitlab.com/fdroid/fdroiddata.git
cd fdroiddata
Optionally create a base config.py and signing keys with:
cd fdroidserver
fdroid init (alternatively, use fdroidserver/./fdroid init)