VAULT-37632 docs for recover support on Vault SSH CA config (#865)

This PR adds docs for
hashicorp/vault-enterprise#8581

Author: bosouza

content/vault/v1.20.x/content/partials/sysadmin/snapshots/restore-secret-support.mdx

@@ -1,4 +1,5 @@
 Plugin    | Path            | Supported snapshot operations | Vault version
 --------- | --------------- | ----------------------------- | --------------
 cubbyhole | `/:secret_name` | `recover`, `read`, `list`     | 1.20.0
-kv (v1)   | `/:secret_name` | `recover`, `read`, `list`     | 1.20.0
+kv (v1)   | `/:secret_name` | `recover`, `read`, `list`     | 1.20.0
+ssh       | `/config/ca`    | `recover`, `read`             | 1.20.3