Typo fix in 1.9 Release Notes
Typo fix in 1.9 Release Notes

Fixes a typo in "Vault Agent improvements"

hashicorp/vault,hashicorp/vault,rnaveiras/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,rnaveiras/vault,rnaveiras/vault,rnaveiras/vault,rnaveiras/vault