Update vm.max_map_count value in "Configure an SUSE host" doc (#4378)

<!--
Thank you for contributing to the Elastic Docs! 🎉
Use this template to help us efficiently review your contribution.
-->

## Summary
<!--
Describe what your PR changes or improves.  
If your PR fixes an issue, link it here. If your PR does not fix an
issue, describe the reason you are making the change.
-->

This is part of work in elastic/docs-content-internal#592. We are
upgrading vm.max_map_count value in "Configure a SUSE host" doc to
reflect the correct value.

## Generative AI disclosure
<!--
To help us ensure compliance with the Elastic open source and
documentation guidelines, please answer the following:
-->
1. Did you use a generative AI (GenAI) tool to assist in creating this
contribution?
- [ ] Yes  
- [x] No  
<!--
2. If you answered "Yes" to the previous question, please specify the
tool(s) and model(s) used (e.g., Google Gemini, OpenAI ChatGPT-4, etc.).

Tool(s) and model(s) used:
-->

Author: kunisen

deploy-manage/deploy/cloud-enterprise/configure-host-suse.md

@@ -156,7 +156,7 @@ You must use XFS and have quotas enabled on all allocators, otherwise disk usage
     ```sh
     cat <<EOF | sudo tee -a /etc/sysctl.conf
     # Required by Elasticsearch
-    vm.max_map_count=262144
+    vm.max_map_count=1048576
     # enable forwarding so the Docker networking works as expected
     net.ipv4.ip_forward=1
     # Decrease the maximum number of TCP retransmissions to 5 as recommended for Elasticsearch TCP retransmission timeout.