point 5.4.21 dev guide to be.4 template (#24)

be.4 template has changes that apply to bepinex 5 plugins as well

articles/dev_guide/plugin_tutorial/1_setup.md

@@ -91,19 +91,20 @@ We will be using them to make our plugins.
 To install the template, run the following command:
 
 ```bash
-dotnet new -i BepInEx.Templates --nuget-source https://nuget.bepinex.dev/v3/index.json
+dotnet new install BepInEx.Templates::2.0.0-be.4 --nuget-source https://nuget.bepinex.dev/v3/index.json
 ```
 
 If the install is successful, you should see a listing of all .NET project templates.
 Among them should be the following BepInEx templates:
 
 ```txt
-Templates                                     Short Name            Language    Tags
---------------------------------------------  --------------------  ----------  --------------------------------------
-BepInEx 5 Plugin Template                     bepinex5plugin        [C#]        BepInEx/BepInEx 5/Plugin
-BepInEx 6 .NET Launcher Plugin Template       bep6plugin_netfx      [C#]        BepInEx/BepInEx 6/Plugin/.NET Launcher
-BepInEx 6 Il2Cpp Plugin Template              bep6plugin_il2cpp     [C#]        BepInEx/BepInEx 6/Plugin/Il2Cpp
-BepInEx 6 Unity Mono Plugin Template          bep6plugin_unitymono  [C#]        BepInEx/BepInEx 6/Plugin/Unity Mono
+Template Name                    Short Name               Language  Tags
+-------------------------------  -----------------------  --------  ------------------------------------------
+BepInEx 5 Plugin                 bepinex5plugin           [C#]      BepInEx/BepInEx 5/Plugin
+BepInEx 6 .NET Core Plugin       bep6plugin_coreclr       [C#]      BepInEx/BepInEx 6/Plugin/CoreCLR/.NET Core
+BepInEx 6 .NET Framework Plugin  bep6plugin_netfx         [C#]      BepInEx/BepInEx 6/Plugin/.NET Framework
+BepInEx 6 Unity Il2Cpp Plugin    bep6plugin_unity_il2cpp  [C#]      BepInEx/BepInEx 6/Plugin/Unity/Il2Cpp
+BepInEx 6 Unity Mono Plugin      bep6plugin_unity_mono    [C#]      BepInEx/BepInEx 6/Plugin/Unity/Mono
 ```
 
 ## Summary