Update snapshot-restore.md (#8734)

* Update snapshot-restore.md

Adds info from: opensearch-project/OpenSearch#16305 

Signed-off-by: pjuri <47542497+pjuri@users.noreply.github.com>

* Update _tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore.md

Co-authored-by: kolchfa-aws <105444904+kolchfa-aws@users.noreply.github.com>
Signed-off-by: pjuri <47542497+pjuri@users.noreply.github.com>

* Update _tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore.md

Co-authored-by: kolchfa-aws <105444904+kolchfa-aws@users.noreply.github.com>
Signed-off-by: pjuri <47542497+pjuri@users.noreply.github.com>

* Update _tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore.md

Co-authored-by: Nathan Bower <nbower@amazon.com>
Signed-off-by: pjuri <47542497+pjuri@users.noreply.github.com>

---------

Signed-off-by: pjuri <47542497+pjuri@users.noreply.github.com>
Co-authored-by: kolchfa-aws <105444904+kolchfa-aws@users.noreply.github.com>
Co-authored-by: Nathan Bower <nbower@amazon.com>

Author: 3 people

_tuning-your-cluster/availability-and-recovery/snapshots/snapshot-restore.md

@@ -110,6 +110,20 @@ You will most likely not need to specify any parameters except for `location`. F
    sudo ./bin/opensearch-keystore add s3.client.default.secret_key
    ```
 
+1. (Optional) If you're using a custom S3 endpoint (for example, MinIO), disable the Amazon EC2 metadata connection:
+
+   ```bash
+   export AWS_EC2_METADATA_DISABLED=true
+   ```
+
+   If you're installing OpenSearch using Helm, update the following settings in your values file:
+
+   ```yml
+   extraEnvs:
+     - name: AWS_EC2_METADATA_DISABLED
+       value: "true"
+   ```
+
 1. (Optional) If you're using temporary credentials, add your session token:
 
    ```bash