rc corrected to response (opensearch-project#772)

* rc corrected to response

There seems to be a mistype in the code. I believe it's meant to say response

Signed-off-by: Patrick O'Connor <35761519+oconpa@users.noreply.github.com>

* Corrected line 33

Signed-off-by: Patrick O'Connor <35761519+oconpa@users.noreply.github.com>

---------

Signed-off-by: Patrick O'Connor <35761519+oconpa@users.noreply.github.com>

guides/bulk.md

@@ -30,7 +30,7 @@ response = client.bulk(docs)
 if response["errors"]:
     print(f"There were errors!")
 else:
-    print(f"Bulk-inserted {len(rc['items'])} items.")
+    print(f"Bulk-inserted {len(response['items'])} items.")
 ```
 
 The client can also serialize an array of data into bulk-delimited JSON for you. See [samples/bulk/bulk_array.py](../samples/bulk/bulk_array.py) for a working sample.
@@ -51,7 +51,7 @@ if response["errors"]:
     for item in response["items"]:
         print(f"{item['index']['status']}: {item['index']['error']['type']}")
 else:
-    print(f"Bulk-inserted {len(rc['items'])} items.")
+    print(f"Bulk-inserted {len(response['items'])} items.")
 ```
 
 ## Bulk Helper
@@ -126,4 +126,4 @@ if len(failed) > 0:
 
 if len(succeeded) > 0:
     print(f"Bulk-inserted {len(succeeded)} items (streaming_bulk).")
-```
+```