build(deps): update ReactiveUI requirement from 16.* to 17.* in /src

Updates the requirements on [ReactiveUI](https://github.com/reactiveui/reactiveui) to permit the latest version.
- [Release notes](https://github.com/reactiveui/reactiveui/releases)
- [Commits](reactiveui/ReactiveUI@16.1.1...17.0.1)

---
updated-dependencies:
- dependency-name: ReactiveUI
  dependency-type: direct:production
...

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

src/Sextant.Avalonia/Sextant.Avalonia.csproj

@@ -8,7 +8,7 @@
     <LangVersion>latest</LangVersion>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ReactiveUI" Version="16.*" />
+    <PackageReference Include="ReactiveUI" Version="17.*" />
     <PackageReference Include="Avalonia" Version="0.10.10" />
     <PackageReference Include="Avalonia.Desktop" Version="0.10.10" />
     <PackageReference Include="Avalonia.ReactiveUI" Version="0.10.10" />

src/Sextant/Sextant.csproj

@@ -13,7 +13,7 @@
     <Compile Remove="Platforms\**\*.cs" />
     <None Include="Platforms\**\*.cs" />
     <PackageReference Include="System.Collections.Immutable" Version="5.0.0" />
-    <PackageReference Include="ReactiveUI" Version="16.*" />
+    <PackageReference Include="ReactiveUI" Version="17.*" />
   </ItemGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('Xamarin.iOS')) ">