Bump Uno.UI from 4.9.26 to 4.9.45 in /src (#99)

Bumps [Uno.UI](https://github.com/unoplatform/uno) from 4.9.26 to 4.9.45.
- [Release notes](https://github.com/unoplatform/uno/releases)
- [Commits](https://github.com/unoplatform/uno/commits)

---
updated-dependencies:
- dependency-name: Uno.UI
  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>

src/ReactiveUI.Uno/ReactiveUI.Uno.csproj

@@ -26,7 +26,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Uno.UI" Version="4.9.26" />
+    <PackageReference Include="Uno.UI" Version="4.9.45" />
     <PackageReference Include="ReactiveUI" Version="19.4.1" />
   </ItemGroup>
 </Project>