Healt Alert Tweaks

Healt Alert Tweaks - 1.21.5

Compatibility build for Minecraft 1.21.5.

Changed

• Updated Minecraft compatibility target to 1.21.5.
• Updated Fabric API target for Minecraft 1.21.5.
• Preserved all low-health vignette settings.
• Preserved all heartbeat sound settings.
• Preserved Mod Menu configuration support.

Technical

• Kept the existing rendering, configuration, and sound logic unchanged.
• Released as a separate build after compatibility validation.