Documentation grammar update for https://www.vaultproject.io/docs/concepts/seal#migration-post-vault-1-5-1 (#13092)
Documentation grammar update for https://www.vaultproject.io/docs/concepts/seal#migration-post-vault-1-5-1 (#13092)

* Update seal.mdx

The following sentence does not read easily:
"Take down the old active node, update its configuration of the old active node to use the new seal blocks (completely unaware of the old seal type) and bring it back up."
I have changed this to the sentence below, which I believe reads better.
Take down the old active node, update its configuration to use the new seal blocks (completely unaware of the old seal type) and bring it back up.

* Update website/content/docs/concepts/seal.mdx

* trigger ci

Co-authored-by: Loann Le <756e02d203e3d2fc92dd4c7f0a9a280ca1b19649@users.noreply.github.com>
Co-authored-by: taoism4504 <ed7067a8e93190f0b581d3c64a2a8cc3fd8d2722@hashicorp.com>
hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault