feat: fix old links

Author: MC-XiaoHei

docs/en/intro.md

@@ -40,4 +40,4 @@ Using the search icon in the top left corner, you can search for anything in thi
 ## Latest documentation changes ( `9.4.1 → 9.7.0` )
 - Updates [Particle data (1.20.5+)](./create-commands/arguments/types/misc/particle-arguments) page with new `Trail` particle information.
 - Adds new [`thenNested()`](./create-commands/command-trees#reduce-indentation-with-nested-arguments) method to command trees.
-- Adds [tools](./test/) for running unit tests on commands.
+- Adds [tools](./test/intro) for running unit tests on commands.

docs/en/test/intro.md

@@ -12,7 +12,7 @@ For a big-picture view, you can find example projects that include automated tes
 
 :::danger Developer's Note:
 
-Many methods have not yet been implemented in the test toolkit. Most notably, only [primitive arguments](../create-commands/arguments/types/primitive-arguments), [String arguments](../create-commands/arguments/types/string-arguments), [literal arguments](../create-commands/arguments/types/literal/), and the [`IntegerRangeArgument`](../create-commands/arguments/types/ranged-arguments) are fully implemented. The [`EntitySelectorArgument`, `PlayerArgument`, and `OfflinePlayerArgument`](../create-commands/arguments/types/entities-arguments) should mostly work, though [target selector arguments](https://minecraft.wiki/w/Target_selectors#Target_selector_arguments) (e.g. `@e[type=pig]`) are not yet implemented.
+Many methods have not yet been implemented in the test toolkit. Most notably, only [primitive arguments](../create-commands/arguments/types/primitive-arguments), [String arguments](../create-commands/arguments/types/string-arguments), [literal arguments](../create-commands/arguments/types/literal/literal-arguments), and the [`IntegerRangeArgument`](../create-commands/arguments/types/ranged-arguments) are fully implemented. The [`EntitySelectorArgument`, `PlayerArgument`, and `OfflinePlayerArgument`](../create-commands/arguments/types/entities-arguments) should mostly work, though [target selector arguments](https://minecraft.wiki/w/Target_selectors#Target_selector_arguments) (e.g. `@e[type=pig]`) are not yet implemented.
 
 If a test ends up calling a method that has not yet been implemented, an `UnimplementedMethodException` will be thrown, causing the test to fail. If you see an `UnimplementedMethodException`, please tell us about it with a [GitHub Issue](https://github.com/CommandAPI/CommandAPI/issues) or a message in the CommandAPI Discord. Pull requests are also always welcome!