Fix error when projects don't have a client/server side set

Author: Zechiax

Modrinth.Net/Models/Enums/Side.cs

@@ -4,5 +4,6 @@ public enum Side
 {
     Required,
     Optional,
-    Unsupported
+    Unsupported,
+    Unknown
 }

Modrinth.Net/Modrinth.Net.csproj

@@ -12,7 +12,7 @@
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
         <PackageReadmeFile>README.md</PackageReadmeFile>
-        <PackageVersion>3.0.4</PackageVersion>
+        <PackageVersion>3.0.5</PackageVersion>
         <TargetFramework>net6.0</TargetFramework>
         <RootNamespace>Modrinth</RootNamespace>
     </PropertyGroup>