build(deps): bump PdfPig

Bumps [PdfPig](https://github.com/UglyToad/PdfPig) from 0.1.9-alpha-20240307-ac027 to 0.1.9-alpha-20240312-845e3.
- [Release notes](https://github.com/UglyToad/PdfPig/releases)
- [Commits](https://github.com/UglyToad/PdfPig/commits)

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

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

Directory.Packages.props

@@ -23,7 +23,7 @@
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageVersion Include="OneOf" Version="3.0.263" />
     <PackageVersion Include="OneOf.SourceGenerator" Version="3.0.263" />
-    <PackageVersion Include="PdfPig" Version="0.1.9-alpha-20240307-ac027" />
+    <PackageVersion Include="PdfPig" Version="0.1.9-alpha-20240312-845e3" />
     <PackageVersion Include="PlantUml.Net" Version="1.4.80" />
     <PackageVersion Include="Spectre.Console" Version="0.48.0" />
     <PackageVersion Include="Spectre.Console.Cli" Version="0.48.0" />