Fix indentation of csproj

Author: JKamsker

LiteDB/LiteDB.csproj

@@ -28,7 +28,7 @@
     <SignAssembly Condition="'$(OS)'=='Windows_NT'">true</SignAssembly>
     <AssemblyOriginatorKeyFile Condition="'$(Configuration)' == 'Release'">LiteDB.snk</AssemblyOriginatorKeyFile>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-	<LangVersion>9.0</LangVersion>
+    <LangVersion>9.0</LangVersion>
   </PropertyGroup>
 
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