build(deps): bump SimpleInjector from 5.2.0 to 5.2.1 (#664)

Bumps [SimpleInjector](https://github.com/simpleinjector/SimpleInjector) from 5.2.0 to 5.2.1.
- [Release notes](https://github.com/simpleinjector/SimpleInjector/releases)
- [Commits](simpleinjector/SimpleInjector@5.2.0...v5.2.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

src/Splat.SimpleInjector/Splat.SimpleInjector.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SimpleInjector" Version="5.2.0" />
+    <PackageReference Include="SimpleInjector" Version="5.2.1" />
   </ItemGroup>
 
   <ItemGroup>