build(deps): update Splat.Drawing requirement from 13.* to 14.* in /src (#3051)

Updates the requirements on [Splat.Drawing](https://github.com/reactiveui/splat) to permit the latest version.
- [Release notes](https://github.com/reactiveui/splat/releases)
- [Commits](reactiveui/splat@13.1.1...14.1.1)

---
updated-dependencies:
- dependency-name: Splat.Drawing
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

src/ReactiveUI.Drawing/ReactiveUI.Drawing.csproj

@@ -27,6 +27,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Splat.Drawing" Version="13.*" />
+    <PackageReference Include="Splat.Drawing" Version="14.*" />
   </ItemGroup>
 </Project>