Bump System.Memory from 4.5.5 to 4.6.0

Bumps [System.Memory](https://github.com/dotnet/maintenance-packages) from 4.5.5 to 4.6.0.
- [Release notes](https://github.com/dotnet/maintenance-packages/releases)
- [Commits](https://github.com/dotnet/maintenance-packages/commits)

---
updated-dependencies:
- dependency-name: System.Memory
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Directory.Packages.props

@@ -3,7 +3,7 @@
   https://learn.microsoft.com/en-us/nuget/consume-packages/Central-Package-Management-->
   <ItemGroup>
     <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
-    <PackageVersion Include="System.Memory" Version="4.5.5" />
+    <PackageVersion Include="System.Memory" Version="4.6.0" />
     <PackageVersion Include="System.IO.Compression" Version="4.3.0" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="FluentAssertions" Version="6.12.2" />