[Feature Request] Document Keyword Lists for Search Attributes

[jlacefie]

Is your feature request related to a problem? Please describe.

Include Keyword Lists in the TF Provider Search Attribute resource documentation to help users use Keyword lists

resource "temporalcloud_namespace_search_attribute" "search_attribute" {
id = "someId
name = "SomName"
namespace_id = "someNamespace.SomeAcctId"
type = "keyword_list" -> "KeywordList"
}