qemu-options: fix incorrect description for '-drive index='

qemu-options: fix incorrect description for '-drive index='

qemu-options.hx contains grammar that a native English-speaking
person would never use.

Replace "This option defines where is connected the drive" by
"This option defines where the drive is connected".

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/853
Signed-off-by: Laurent Vivier <[email protected]>
Reviewed-by: Thomas Huth <[email protected]>
Message-Id: <20220202143422[email protected]>
Signed-off-by: Laurent Vivier <[email protected]>