Bump System.Text.Encoding.CodePages from 8.0.0 to 9.0.0 (#154)

Bumps [System.Text.Encoding.CodePages](https://github.com/dotnet/runtime) from 8.0.0 to 9.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.0...v9.0.0)

---
updated-dependencies:
- dependency-name: System.Text.Encoding.CodePages
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

GeneGenie.Gedcom/GeneGenie.Gedcom.csproj

@@ -25,7 +25,7 @@
 
     <ItemGroup>
         <PackageReference Include="System.Collections.Immutable" Version="8.0.0" />
-        <PackageReference Include="System.Text.Encoding.CodePages" Version="8.0.0" />
+        <PackageReference Include="System.Text.Encoding.CodePages" Version="9.0.0" />
     </ItemGroup>
 
     <PropertyGroup>