Bump ReactiveUI and ReactiveUI.Testing

Bumps ReactiveUI from 23.2.19 to 23.2.28
Bumps ReactiveUI.Testing from 23.2.19 to 23.2.28

---
updated-dependencies:
- dependency-name: ReactiveUI
  dependency-version: 23.2.28
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: reactiveui
- dependency-name: ReactiveUI
  dependency-version: 23.2.28
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: reactiveui
- dependency-name: ReactiveUI.Testing
  dependency-version: 23.2.28
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: reactiveui
...

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

Author: dependabot[bot]

src/ImageSort/ImageSort.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="DynamicData" Version="9.4.31" />
-    <PackageReference Include="ReactiveUI" Version="23.2.19" />
+    <PackageReference Include="ReactiveUI" Version="23.2.28" />
     <PackageReference Include="GitVersionTask" Version="5.5.1">
       <PrivateAssets>All</PrivateAssets>
     </PackageReference>

tests/ImageSort.UnitTests/ImageSort.UnitTests.csproj

@@ -15,8 +15,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="ReactiveUI" Version="23.2.19" />
-    <PackageReference Include="ReactiveUI.Testing" Version="23.2.19" />
+    <PackageReference Include="ReactiveUI" Version="23.2.28" />
+    <PackageReference Include="ReactiveUI.Testing" Version="23.2.28" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <PrivateAssets>all</PrivateAssets>