Update documentation changelog and arguments.md

Author: DerEchtePilz

docssrc/src/arguments.md

@@ -145,6 +145,7 @@ The type to cast each argument (declared in the `dev.jorel.commandapi.arguments`
 |                                                       [`ParticleArgument`](./argument_particle.md) | `dev.jorel.commandapi.wrappers.ParticleData`                                                                                                                                                                                                        |
 |                                         [`PlayerArgument`](./argument_entities.md#player-argument) | `org.bukkit.entity.Player`                                                                                                                                                                                                                          |
 |                                                     [`PotionEffectArgument`](./argument_potion.md) | `org.bukkit.potion.PotionEffectType`                                                                                                                                                                                                                |
+|                                       [`PotionEffectArgument.NamespacedKey`](./argument_potion.md) | `org.bukkit.NamespacedKey`                                                                                                                                                                                                                          |
 |                                                           [`RecipeArgument`](./argument_recipe.md) | The cast type changes depending on your Minecraft version:<br><ul><li>Version 1.14.4 and below:<br />`org.bukkit.inventory.Recipe`</li><br /><li>1.15 and above:<br />`org.bukkit.inventory.ComplexRecipe` </li></ul>                               |
 |                                                       [`RotationArgument`](./argument_rotation.md) | `dev.jorel.commandapi.wrappers.Rotation`                                                                                                                                                                                                            |
 |                     [`ScoreboardSlotArgument`](./argument_scoreboards.md#scoreboard-slot-argument) | `dev.jorel.commandapi.wrappers.ScoreboardSlot`                                                                                                                                                                                                      |

docssrc/src/intro.md

@@ -42,6 +42,7 @@ Here's the list of changes to the documentation between each update. You can vie
 - Adds [Velocity](./velocity_intro.md) page to outline how to setup the CommandAPI for Velocity
 - Updates [CommandArguments](./commandarguments.md) to document new additions for safe arguments
 - Updates [Potion effect arguments](./argument_potion.md) to include examples for the newly added `NamespacedKey` variant for the `PotionEffectArgument`
+- Updates [Arguments](./arguments.md) to list the newly added `PotionEffectArgument.NamespacedKey` argument
 
 ### Documentation changes 9.2.0 \\(\rightarrow\\) 9.3.0