Fix dll reference

BepInEx/BepInEx.csproj

@@ -53,9 +53,8 @@
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Data" />
     <Reference Include="System.Xml" />
-    <Reference Include="UnityEngine, Version=0.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <SpecificVersion>False</SpecificVersion>
-      <HintPath>D:\koikatu\KoikatuTrial_Data\Managed\UnityEngine.dll</HintPath>
+    <Reference Include="UnityEngine">
+      <HintPath>..\lib\UnityEngine.dll</HintPath>
       <Private>False</Private>
     </Reference>
   </ItemGroup>