docs(log-collector): add warning banner post-execution for log collector

[ndbaker1]

Issue #, if available:

Description of changes:

This PR adds a banner to notify users they may want to redact potentially sensitive data in their log bundles.

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Testing Done

ran on a test instance

> sudo ./log-collector-script/linux/eks-log-collector.sh

	This is version 0.7.8. New versions can be found at https://github.com/awslabs/amazon-eks-ami/blob/main/log-collector-script/

Trying to collect common operating system logs...
Trying to collect kernel logs...
Trying to collect modinfo... Trying to collect mount points and volume information...
Trying to collect SELinux status...
Trying to collect iptables information...
Trying to collect installed packages...
...TRUNCATED...
Trying to Collect sandbox-image daemon information...
Trying to Collect CPU Throttled Process Information...
Trying to Collect IO Throttled Process Information...
Trying to Collect reboot history...
Trying to Collect Nvidia Bug report... No Nvidia drivers found, nothing to do.

Trying to archive gathered information...

	Done... your bundled logs are located in /var/log/eks_i-049d185b673566680_2025-03-06_1822-UTC_0.7.8.tar.gz

****************************************************************************************
* WARNING: The log bundle collected by this script may contain sensitive information.  *
*                                                                                      *
* Please review the contents of the log bundle carefully and redact or obfuscate       *
* any information you do not wish to be accessible before sharing it with others.      *
****************************************************************************************

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