Bump dotNetRdf from 3.5.1 to 3.5.2

---
updated-dependencies:
- dependency-name: dotNetRdf
  dependency-version: 3.5.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

dotnet/CASE2GeoJSON.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="dotnetrdf" Version="3.5.1" />
+    <PackageReference Include="dotnetrdf" Version="3.5.2" />
     <PackageReference Include="newtonsoft.json" Version="13.0.4" />
   </ItemGroup>