Update dependency elastic/beats to v8.12.0

This MR contains the following updates:

Package	Type	Update	Change
elastic/beats	ironbank-github	minor	v8.11.4 -> v8.12.0

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Release Notes

elastic/beats (elastic/beats)

v8.12.0: Beats 8.12.0

Compare Source

Downloads: https://elastic.co/downloads/beats Release notes: https://www.elastic.co/guide/en/beats/libbeat/main/release-notes-8.12.0.html

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