Bump version to 6.16.0

Signed-off-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

ShopifySharp/ShopifySharp.csproj

@@ -3,7 +3,7 @@
     <TargetFrameworks>net6.0;net7.0;netstandard2.0;net8.0</TargetFrameworks>
     <AssemblyName>ShopifySharp</AssemblyName>
     <RootNamespace>ShopifySharp</RootNamespace>
-    <VersionPrefix>6.15.1</VersionPrefix>
+    <VersionPrefix>6.16.0</VersionPrefix>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <LangVersion>Latest</LangVersion>
@@ -25,4 +25,4 @@
     <PackageReference Include="newtonsoft.json" Version="13.0.2" />
     <PackageReference Include="System.Text.Json" Version="7.0.3" />
   </ItemGroup>
-</Project>
+</Project>