Update gc telemetry information (#8445)
Update gc telemetry information (#8445)

* Update gc telemetry information 

Fix total_gc_pause_ns units (should be ns not ms) and add gc_pause_ns description

* Update telemetry.mdx
rnaveiras/vault,hashicorp/vault,hashicorp/vault,hartsock/vault,rnaveiras/vault,hartsock/vault,hashicorp/vault,hashicorp/vault,hartsock/vault,rnaveiras/vault,hartsock/vault,rnaveiras/vault,hashicorp/vault,hashicorp/vault,rnaveiras/vault,hartsock/vault