Update dependency Soenneker.Extensions.String to 4.0.668 (#964)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/Soenneker.Extensions.HttpContext/Soenneker.Extensions.HttpContext.csproj

@@ -46,6 +46,6 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="Soenneker.Extensions.String" Version="4.0.667" />
+      <PackageReference Include="Soenneker.Extensions.String" Version="4.0.668" />
     </ItemGroup>
 </Project>