Bump Syncfusion.DocIO.Net.Core from 28.1.39 to 28.2.3 in /src

Bumps Syncfusion.DocIO.Net.Core from 28.1.39 to 28.2.3.

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

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="NUnit" Version="4.3.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
-    <PackageVersion Include="Syncfusion.DocIO.Net.Core" Version="28.1.39" />
+    <PackageVersion Include="Syncfusion.DocIO.Net.Core" Version="28.2.3" />
     <PackageVersion Include="Syncfusion.DocIORenderer.Net.Core" Version="28.1.38" />
     <PackageVersion Include="Syncfusion.EJ2.PdfViewer.AspNet.Core.Windows" Version="28.1.37" />
     <PackageVersion Include="Syncfusion.Pdf.Net.Core" Version="28.2.3" />