update entity-alias doc fix (#19435)

website/content/api-docs/secret/identity/entity-alias.mdx

@@ -135,14 +135,14 @@ This endpoint is used to update an existing entity alias.
 
 - `id` `(string: <required>)` – Identifier of the entity alias.
 
-- `name` `(string: <required>)` - Name of the alias. Name should be the identifier
+- `name` `(string: "")` - Name of the alias. Name should be the identifier
   of the client in the authentication source. For example, if the alias belongs
   to userpass backend, the name should be a valid username within userpass
   backend. If alias belongs to GitHub, it should be the GitHub username.
 
-- `canonical_id` `(string: <required>)` - Entity ID to which this alias belongs to.
+- `canonical_id` `(string: "")` - Entity ID to which this alias belongs to.
 
-- `mount_accessor` `(string: <required>)` - Accessor of the mount to which the
+- `mount_accessor` `(string: "")` - Accessor of the mount to which the
   alias should belong to.
 
 - `custom_metadata` `(map<string|string>: <optional>)` - A map of arbitrary string to string valued