update bulk docs

Author: basemkhirat

readme.md

@@ -852,6 +852,15 @@ ES::type("my_type")->id(3)->update([
 
 # [id is required]
 ```
+
+```php
+# Bulk update
+
+ES::type("my_type")->bulk(function ($bulk){
+	$bulk->id(10)->update(["title" => "Test document 1","content" => "Sample content 1"]);
+	$bulk->id(11)->update(["title" => "Test document 2","content" => "Sample content 2"]);
+});
+```
 
 ##### Incrementing field
 ```php
@@ -913,6 +922,15 @@ ES::type("my_type")->id(3)->delete();
 # [id is required]
 ```
 
+```php
+# Bulk delete
+
+ES::type("my_type")->bulk(function ($bulk){
+	$bulk->id(10)->delete();
+	$bulk->id(11)->delete();
+});
+```
+
 ## Releases
 
   See [Change Log](https://github.com/basemkhirat/elasticsearch/blob/master/CHANGELOG.md).