Update telemetry.html.md to add a note on replication metrics (#8036)
Update telemetry.html.md to add a note on replication metrics (#8036)

Added a note on replication metrics.
hashicorp/vault,hartsock/vault,hartsock/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,kingland/vault,quixoten/vault,rnaveiras/vault,quixoten/vault,quixoten/vault,rnaveiras/vault,hartsock/vault,rnaveiras/vault,hartsock/vault,hashicorp/vault,hashicorp/vault,kingland/vault,rnaveiras/vault,hartsock/vault,kingland/vault,kingland/vault,quixoten/vault,rnaveiras/vault,kingland/vault