docs(samples): updated comments in create assessment (#641)

* docs(samples): updated comments

Updated comments to clarify create assessment similarity for both score and checkbox based site keys.

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recaptcha_enterprise/cloud-client/src/main/java/recaptcha/CreateAssessment.java

@@ -39,11 +39,12 @@ public static void main(String[] args) throws IOException {
   }
 
   /**
-   * Create an assessment to analyze the risk of an UI action.
+   * Create an assessment to analyze the risk of an UI action. Assessment approach is the same for
+   * both 'score' and 'checkbox' type recaptcha site keys.
    *
    * @param projectID : GCloud Project ID
    * @param recaptchaSiteKey : Site key obtained by registering a domain/app to use recaptcha
-   *     services.
+   *     services. (score/ checkbox type)
    * @param token : The token obtained from the client on passing the recaptchaSiteKey.
    * @param recaptchaAction : Action name corresponding to the token.
    */
@@ -77,6 +78,7 @@ public static void createAssessment(
       }
 
       // Check if the expected action was executed.
+      // (If the key is checkbox type and 'action' attribute wasn't set, skip this check.)
       if (!response.getTokenProperties().getAction().equals(recaptchaAction)) {
         System.out.println(
             "The action attribute in reCAPTCHA tag is: "