Update dependency com.github.decentsoftware-eu:decentholograms to v2.8.12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.github.decentsoftware-eu:decentholograms (source)	2.8.11 -> 2.8.12

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Release Notes

DecentSoftware-eu/DecentHolograms (com.github.decentsoftware-eu:decentholograms)

v2.8.12: [2.8.12] Support for 1.21.3

Compare Source

Changes in Version 2.8.12

New features:

• Added support for 1.21.2 and 1.21.3. (Thanks shaijana)
• Added holograms-eye-level-positioning config option

Bugfixes:

• Fixed skull textures on 1.21.1. (Thanks Olzie-12)
• Fixed loading worlds after their worlds not supporting UUID world identifiers.
• Fixed exception being thrown then adding an action with invalid type.
• Improved some parts of the codebase.

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Configuration

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