Ruby: rack - add some qldoc

Author: alexrford

ruby/ql/lib/codeql/ruby/frameworks/rack/internal/Request.qll

@@ -15,6 +15,7 @@ module Request {
     RackRequest() { this = API::getTopLevelMember("Rack").getMember("Request").getInstance() }
   }
 
+  /** An access to the parameters of a request to a rack application via a `Rack::Request` instance. */
   private class RackRequestParamsAccess extends Http::Server::RequestInputAccess::Range {
     RackRequestParamsAccess() {
       this = any(RackRequest req).getAMethodCall(["params", "query_string", "[]", "fullpath"])
@@ -27,6 +28,7 @@ module Request {
     }
   }
 
+  /** An access to the cookies of a request to a rack application via a `Rack::Request` instance. */
   private class RackRequestCookiesAccess extends Http::Server::RequestInputAccess::Range {
     RackRequestCookiesAccess() { this = any(RackRequest req).getAMethodCall("cookies") }