Update index.html.md (#7580)
Update index.html.md (#7580)

"before storage data at rest" seems like it was intended to read either "before storing data at rest" or "before storage of data at rest".
rnaveiras/vault,kingland/vault,quixoten/vault,hashicorp/vault,hartsock/vault,rnaveiras/vault,hashicorp/vault,quixoten/vault,joelthompson/vault,joelthompson/vault,quixoten/vault,quixoten/vault,hartsock/vault,kingland/vault,joelthompson/vault,kingland/vault,kingland/vault,kingland/vault,hashicorp/vault,hashicorp/vault,rnaveiras/vault,hartsock/vault,hartsock/vault,rnaveiras/vault,joelthompson/vault,hashicorp/vault,rnaveiras/vault,hashicorp/vault,hartsock/vault