Miscellaneous changes before updating to 1.21.3

[dicedpixels]

This PR addresses few issues and introduces some changes:

• Updates Fabric API version 0.100.4+1.21 → 0.102.0+1.21
• With above, fixes develop/events#adding-items-to-the-loot-table uses v2 instead of v3 #199 by using net.fabricmc.fabric.api.loot.v3.LootTableEvents and adds the registries parameter.
• Fixes players/troubleshooting/crash-reports explains a crash report different to what it links to #189 by referring to the correct error line from the stack trace.
• Attempted to fix issue 173 by providing a better explanation for tickDelta. Although, I'm not sure if we need to correct the usage here. Up for discussion.
• Related to above:
  Renamed some usages of the word deltaTick with tickDelta to align with Yarn usages like RenderTickCounter#getTickDelta.
  Rename deltaTickManager and tickDeltaManager to tickCounter to align with the actual class name RenderTickCounter.
• Potions guide had a code embed offset by one line, this PR fixes that as well.

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