Fix wrong link in CHANGELOG.md (#8429)
Fix wrong link in CHANGELOG.md (#8429)

from `https://github.com/hashicorp/vault/pull/78`
to `https://github.com/hashicorp/vault-plugin-auth-kubernetes/pull/78`
hashicorp/vault,hashicorp/vault,rnaveiras/vault,hashicorp/vault,hartsock/vault,hashicorp/vault,rnaveiras/vault,rnaveiras/vault,hartsock/vault,rnaveiras/vault,hashicorp/vault,rnaveiras/vault,hartsock/vault,hashicorp/vault,hartsock/vault,hartsock/vault