Add MSI installer change to 8.12 release notes.

[cmacknz]

Add the change made in elastic/elastic-stack-installers#209 to stop using C:\ProgramData as a breaking change for the MSI installers.

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[Sxderp]

While it's great the release notes mention the new paths, it doesn't say why this change was necessary. I think that would be helpful.

[cmacknz]

Yes, sorry. It is tied to a reported security vulnerability, we have a separate process for disclosing those and I can't put the explanation here unfortunately.

[amitkanfer]

FWIW - We are looking for ways to allow overriding the installation folder.

[strawgate]

@cmacknz it looks like this is under the heartbeat section and it's not properly formatted in the release notes https://www.elastic.co/guide/en/beats/libbeat/current/release-notes-8.12.0.html

Heartbeat - Decrease the ES default timeout to 10 for the load monitor state requests. - Windows MSI installers now store configuration in C:\Program Files instead of C:\ProgramData. elastic/elastic-stack-installers#209

[cmacknz]

#38076