website: add missing `@` to example (#5560)
website: add missing `@` to example (#5560)

* website: remove mention of `@` in command

The command does not contain the mentioned `@` symbol and can be
confusing.

* docs: use `policy-name` instead of `my-policy`

Just making things consistent.

hashicorp/vault,rnaveiras/vault,quixoten/vault,quixoten/vault,hartsock/vault,rnaveiras/vault,hashicorp/vault,hashicorp/vault,kingland/vault,joelthompson/vault,kingland/vault,quixoten/vault,hartsock/vault,hartsock/vault,hashicorp/vault,joelthompson/vault,rnaveiras/vault,hashicorp/vault,hashicorp/vault,joelthompson/vault,quixoten/vault,rnaveiras/vault,kingland/vault,hartsock/vault,rnaveiras/vault,kingland/vault,joelthompson/vault,hartsock/vault,kingland/vault