Update metrics table in README

[iTrooz]

Is there an existing issue for this bug?

• I have searched the existing issues before opening this bug report.

Current Behavior

The README table (https://github.com/Cubxity/UnifiedMetrics?tab=readme-ov-file#metrics) shows outdated metrics. For example, it shows the metric world, but this metric does not exist. In contract, the exporter exports the metric minecraft_world_entities_count, but this isn't shown in the table

Also, would it be possible to document them more ? For example, I'd like to know what minecraft_world_loaded_chunks exports precisely, as there are multiple stages of loading for chunks (https://minecraft.fandom.com/wiki/Chunk#Level_and_load_type)

Expected Behavior

The README metrics table should be up to date
The README metrics table should document metrics

Server type

Fabric

Server Version

1.20.1

Other Mods / Plugins in your server

Syntra connector (I am using Forge)

Error log

No response

More information

No response