Bump System.Text.Encoding.CodePages

Bumps [System.Text.Encoding.CodePages](https://github.com/dotnet/runtime) from 9.0.0-preview.7.24405.7 to 9.0.0-rc.1.24431.7.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v9.0.0-preview.7.24405.7...v9.0.0-rc.1.24431.7)

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

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

Edge.csproj

@@ -54,7 +54,7 @@
     <PackageReference Include="Microsoft.WindowsAppSDK" Version="1.6.240829007" />
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.1" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
-    <PackageReference Include="System.Text.Encoding.CodePages" Version="9.0.0-preview.7.24405.7" />
+    <PackageReference Include="System.Text.Encoding.CodePages" Version="9.0.0-rc.1.24431.7" />
     <Manifest Include="$(ApplicationManifest)" />
   </ItemGroup>