Bump ReactiveUI.Fody and ReactiveUI (#3113)

Bumps [ReactiveUI.Fody](https://github.com/reactiveui/reactiveui) and [ReactiveUI](https://github.com/reactiveui/reactiveui). These dependencies needed to be updated together.

Updates `ReactiveUI.Fody` from 19.5.31 to 19.5.39
- [Release notes](https://github.com/reactiveui/reactiveui/releases)
- [Commits](https://github.com/reactiveui/reactiveui/compare/19.5.31...19.5.39)

Updates `ReactiveUI` from 19.5.31 to 19.5.39
- [Release notes](https://github.com/reactiveui/reactiveui/releases)
- [Commits](https://github.com/reactiveui/reactiveui/compare/19.5.31...19.5.39)

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

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

ReactiveExample/ReactiveExample.csproj

@@ -10,8 +10,8 @@
     <InformationalVersion>1.14.0-pre.1+Branch.develop.Sha.e0b7464669ef87b96b57f2285200e02bcf85d0e7</InformationalVersion>-->
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ReactiveUI.Fody" Version="19.5.31" />
-    <PackageReference Include="ReactiveUI" Version="19.5.31" />
+    <PackageReference Include="ReactiveUI.Fody" Version="19.5.39" />
+    <PackageReference Include="ReactiveUI" Version="19.5.39" />
     <PackageReference Include="ReactiveMarbles.ObservableEvents.SourceGenerator" Version="1.3.1" PrivateAssets="all" />
   </ItemGroup>
   <ItemGroup>