fix: correct json extension for sample ecommerce data

Signed-off-by: hainenber <dotronghai96@gmail.com>

_getting-started/ingest-data.md

@@ -50,32 +50,32 @@ Use the following steps to create a sample index and define field mappings for t
     ```
     {% include copy.html %}
 
-1. Download [ecommerce.json](https://github.com/opensearch-project/documentation-website/blob/{{site.opensearch_major_minor_version}}/assets/examples/ecommerce.json). This file contains the index data formatted so that it can be ingested by the Bulk API:
+1. Download [ecommerce.ndjson](https://github.com/opensearch-project/documentation-website/blob/{{site.opensearch_major_minor_version}}/assets/examples/ecommerce.ndjson). This file contains the index data formatted so that it can be ingested by the Bulk API:
 
     To use cURL, send the following request:
 
     ```bash
-    curl -O https://github.com/raw/opensearch-project/documentation-website/{{site.opensearch_major_minor_version}}/assets/examples/ecommerce.json
+    curl -O https://github.com/raw/opensearch-project/documentation-website/{{site.opensearch_major_minor_version}}/assets/examples/ecommerce.ndjson
     ```
     {% include copy.html %}
 
     To use wget, send the following request:
 
     ```
-    wget https://github.com/raw/opensearch-project/documentation-website/{{site.opensearch_major_minor_version}}/assets/examples/ecommerce.json
+    wget https://github.com/raw/opensearch-project/documentation-website/{{site.opensearch_major_minor_version}}/assets/examples/ecommerce.ndjson
     ```
     {% include copy.html %}
 
 1. Define the field mappings provided in the mapping file:
     ```bash
-    curl -H "Content-Type: application/x-ndjson" -X PUT "https://localhost:9200/ecommerce" -ku admin:<custom-admin-password> --data-binary "@ecommerce-field_mappings.json"
+    curl -H "Content-Type: application/json" -X PUT "https://localhost:9200/ecommerce" -ku admin:<custom-admin-password> --data-binary "@ecommerce-field_mappings.json"
     ```
     {% include copy.html %}
 
 1. Upload the documents using the Bulk API:
 
     ```bash
-    curl -H "Content-Type: application/x-ndjson" -X PUT "https://localhost:9200/ecommerce/_bulk" -ku admin:<custom-admin-password> --data-binary "@ecommerce.json"
+    curl -H "Content-Type: application/x-ndjson" -X PUT "https://localhost:9200/ecommerce/_bulk" -ku admin:<custom-admin-password> --data-binary "@ecommerce.ndjson"
     ```
     {% include copy.html %}
 

_install-and-configure/upgrade-opensearch/appendix/rolling-upgrade-lab.md

@@ -169,12 +169,12 @@ This section can be broken down into two parts:
    {% include copy.html %}
 1. Next, download the bulk data that you will ingest into this index:
    ```bash
-   wget https://github.com/raw/opensearch-project/documentation-website/main/assets/examples/ecommerce.json
+   wget https://github.com/raw/opensearch-project/documentation-website/main/assets/examples/ecommerce.ndjson
    ```
    {% include copy.html %}
 1. Use the [Create index]({{site.url}}{{site.baseurl}}/api-reference/index-apis/create-index/) API to create an index using the mappings defined in `ecommerce-field_mappings.json`:
    ```bash
-   curl -H "Content-Type: application/x-ndjson" \
+   curl -H "Content-Type: application/json" \
       -X PUT "https://localhost:9201/ecommerce?pretty" \
       --data-binary "@ecommerce-field_mappings.json" \
       -ku admin:<custom-admin-password>
@@ -188,11 +188,11 @@ This section can be broken down into two parts:
       "index" : "ecommerce"
    }
    ```
-1. Use the [Bulk]({{site.url}}{{site.baseurl}}/api-reference/document-apis/bulk/) API to add data to the new ecommerce index from `ecommerce.json`:
+1. Use the [Bulk]({{site.url}}{{site.baseurl}}/api-reference/document-apis/bulk/) API to add data to the new ecommerce index from `ecommerce.ndjson`:
    ```bash
    curl -H "Content-Type: application/x-ndjson" \
       -X PUT "https://localhost:9201/ecommerce/_bulk?pretty" \
-      --data-binary "@ecommerce.json" \
+      --data-binary "@ecommerce.ndjson" \
       -ku admin:<custom-admin-password>
    ```
    {% include copy.html %}