Add primer link

content/news/21.0release.md

@@ -56,6 +56,7 @@ Enchantments are no longer a static, built-in registry, and instead are a datapa
 With this change, methods that previously took an `Enchantment` will now take a `Holder<Enchantment>`, and all fields in the `Enchantments` class are `ResourceKey<Enchantment>`s.  
 Additionally, your code should now use `EnchantmentEffectComponents` to determine whether an enchantment should affect something, instead of relying on direct level checks.
 
+For more information, we encourage you to consult [ChampionAsh](https://github.com/ChampionAsh5357)'s [1.21 primer](https://gist.github.com/ChampionAsh5357/d895a7b1a34341e19c80870720f9880f).
 ## The NeoForge changes
 The first NeoForge beta release for 1.21 comes with some changes too.