Bump LinqKit.Core

Bumps the dotnet group in /docs/csharp/linq/snippets/HowToBuildDynamicQueries with 1 update: [LinqKit.Core](https://github.com/scottksmith95/LINQKit).


Updates `LinqKit.Core` from 1.2.7 to 1.2.8
- [Release notes](https://github.com/scottksmith95/LINQKit/releases)
- [Changelog](https://github.com/scottksmith95/LINQKit/blob/master/ReleaseNotes.md)
- [Commits](https://github.com/scottksmith95/LINQKit/commits)

---
updated-dependencies:
- dependency-name: LinqKit.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs/csharp/linq/snippets/HowToBuildDynamicQueries/HowToBuildDynamicQueries.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="ExpressionTreeToString" Version="3.4.71" />
-    <PackageReference Include="LinqKit.Core" Version="1.2.7" />
+    <PackageReference Include="LinqKit.Core" Version="1.2.8" />
     <PackageReference Include="System.Linq.Dynamic.Core" Version="1.5.1" />
   </ItemGroup>