docs: Issue on page C/C ++ Driver for ScyllaDB

I would like to report an issue on page https://cpp-driver.docs.scylladb.com/master/index

### Problem
Broken "Installation" link under https://cpp-driver.docs.scylladb.com/master/#getting-the-driver

So, from this page I cannot get to a place from which I can get the driver.

###  Suggest a fix

Add the correct link to get the driver