Unity tutorial part 2 CLI call fix (#3665)

# Description of Changes
Fixed a CLI call in docs Unity tutorial that generated client module
code in an incorrect directory.

# API and ABI breaking changes
None.

# Expected complexity level and risk
1

# Testing
Built a project by following the tutorial with the wrong call vs the
fixed call. Compared against different parts of the tutorial to confirm
the intent.

---------

Signed-off-by: T-Podgorski <147391857+T-Podgorski@users.noreply.github.com>
Signed-off-by: Tyler Cloutier <cloutiertyler@users.noreply.github.com>
Co-authored-by: Tyler Cloutier <cloutiertyler@users.noreply.github.com>
Co-authored-by: clockwork-labs-bot <clockwork-labs-bot@users.noreply.github.com>

Author: 3 people

docs/versioned_docs/version-1.12.0/00100-intro/00300-tutorials/00300-unity-tutorial/00300-part-2.md

@@ -501,10 +501,10 @@ The `spacetime` CLI has built in functionality to let us generate C# types that
 </Tabs>
 
 ```sh
-spacetime generate --lang csharp --out-dir ../Assets/autogen
+spacetime generate --lang csharp --out-dir ../Assets/module_bindings # you can call this anything, I have chosen `module_bindings`
 ```
 
-This will generate a set of files in the `Assets/autogen` directory which contain the code generated types and reducer functions that are defined in your module, but usable on the client.
+This will generate a set of files in the `blackholio/Assets/module_bindings` directory which contain the code generated types and reducer functions that are defined in your module, but usable on the client.
 
 ```
 ├── Reducers
@@ -525,7 +525,7 @@ This will generate a set of files in the `Assets/autogen` directory which contai
 └── SpacetimeDBClient.g.cs
 ```
 
-This will also generate a file in the `Assets/autogen/SpacetimeDBClient.g.cs` directory with a type aware `DbConnection` class. We will use this class to connect to your database from Unity.
+This will also generate a file in the `blackholio/Assets/module_bindings/SpacetimeDBClient.g.cs` directory with a type aware `DbConnection` class. We will use this class to connect to your database from Unity.
 
 > IMPORTANT! At this point there will be an error in your Unity project. Due to a [known issue](https://docs.unity3d.com/6000.0/Documentation/Manual/csharp-compiler.html) with Unity and C# 9 you need to insert the following code into your Unity project.
 >