Add search settings

PATCH https://graph.microsoft.com/beta/external/connections/sampleConnectionId

Request Body

{"searchSettings"=>{"searchResultTemplates"=>[{"id"=>"graphApiMrt01", "layout"=>{"type"=>"AdaptiveCard", "version"=>"1.2", "$schema"=>"http://adaptivecards.io/schemas/adaptive-card.json", "body"=>[{"type"=>"TextBlock", "text"=>"[${title}](${url})"}]}, "priority"=>10000}]}}