Bump Syncfusion.DocIO.Net.Core, Syncfusion.DocIORenderer.Net.Core and Syncfusion.Pdf.Net.Core

Bumps Syncfusion.DocIO.Net.Core, Syncfusion.DocIORenderer.Net.Core and Syncfusion.Pdf.Net.Core. These dependencies needed to be updated together.

Updates `Syncfusion.DocIO.Net.Core` from 28.2.6 to 28.2.6

Updates `Syncfusion.DocIORenderer.Net.Core` from 28.2.5 to 28.2.6

Updates `Syncfusion.Pdf.Net.Core` from 28.2.6 to 28.2.6

---
updated-dependencies:
- dependency-name: Syncfusion.DocIO.Net.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Syncfusion.DocIORenderer.Net.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Syncfusion.Pdf.Net.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -10,7 +10,7 @@
     <PackageVersion Include="NUnit3TestAdapter" Version="5.0.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
     <PackageVersion Include="Syncfusion.DocIO.Net.Core" Version="28.2.6" />
-    <PackageVersion Include="Syncfusion.DocIORenderer.Net.Core" Version="28.2.5" />
+    <PackageVersion Include="Syncfusion.DocIORenderer.Net.Core" Version="28.2.6" />
     <PackageVersion Include="Syncfusion.EJ2.PdfViewer.AspNet.Core.Windows" Version="28.1.37" />
     <PackageVersion Include="Syncfusion.Pdf.Net.Core" Version="28.2.6" />
     <PackageVersion Include="Syncfusion.Presentation.Net.Core" Version="28.2.6" />