Replace getErrors() with getBindingResult() in examples

DataBinder#getErrors was removed in v4.0.0.M1.

Closes gh-36170

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>

(cherry picked from commit 385e62dbf0)

spring-web/src/main/java/org/springframework/web/bind/ServletRequestDataBinder.java

@@ -69,7 +69,7 @@ import org.springframework.web.util.WebUtils;
  * // trigger actual binding of request parameters
  * binder.bind(request);
  * // optionally evaluate binding errors
- * Errors errors = binder.getErrors();
+ * Errors errors = binder.getBindingResult();
  * ...</pre>
  *
  * @author Rod Johnson

spring-web/src/main/java/org/springframework/web/bind/support/WebRequestDataBinder.java

@@ -53,7 +53,7 @@ import org.springframework.web.multipart.support.StandardServletPartUtils;
  * which include specifying allowed/required fields, and registering custom
  * property editors.
  *
- * <p>Can also used for manual data binding in custom web controllers or interceptors
+ * <p>Can also be used for manual data binding in custom web controllers or interceptors
  * that build on Spring's {@link org.springframework.web.context.request.WebRequest}
  * abstraction: for example, in a {@link org.springframework.web.context.request.WebRequestInterceptor}
  * implementation. Simply instantiate a WebRequestDataBinder for each binding
@@ -68,7 +68,7 @@ import org.springframework.web.multipart.support.StandardServletPartUtils;
  * // trigger actual binding of request parameters
  * binder.bind(request);
  * // optionally evaluate binding errors
- * Errors errors = binder.getErrors();
+ * Errors errors = binder.getBindingResult();
  * ...</pre>
  *
  * @author Juergen Hoeller