Bump System.Memory and System.Runtime.CompilerServices.Unsafe

Bumps [System.Memory](https://github.com/dotnet/maintenance-packages) and [System.Runtime.CompilerServices.Unsafe](https://github.com/dotnet/maintenance-packages). These dependencies needed to be updated together.

Updates `System.Memory` 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)

Updates `System.Runtime.CompilerServices.Unsafe` from 6.1.0 to 6.1.0
- [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
- dependency-name: System.Runtime.CompilerServices.Unsafe
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -11,7 +11,7 @@
     <!-- <DiaMetadataVersion>0.2.185-preview-g7e1e6a442c</DiaMetadataVersion> -->
     <ApiDocsVersion>0.1.42-alpha</ApiDocsVersion>
     <CodeAnalysisVersion>4.12.0</CodeAnalysisVersion>
-    <CodeAnalysisVersion Condition="'$(IsTestProject)'!='true'">3.11.0</CodeAnalysisVersion>
+    <CodeAnalysisVersion Condition="'$(IsTestProject)'!='true'">4.12.0</CodeAnalysisVersion>
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="MessagePack" Version="2.2.85" />
@@ -28,7 +28,7 @@
     <PackageVersion Include="Microsoft.Windows.WDK.Win32Metadata" Version="$(WDKMetadataVersion)" />
     <PackageVersion Include="NuGet.Protocol" Version="6.10.0" />
     <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />
-    <PackageVersion Include="System.Memory" Version="4.5.5" />
+    <PackageVersion Include="System.Memory" Version="4.6.0" />
     <PackageVersion Include="System.Reflection.Metadata" Version="8.0.0" />
     <PackageVersion Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.0" />
     <PackageVersion Include="System.Text.Encodings.Web" Version="4.7.1" />
@@ -46,8 +46,8 @@
     <!-- These versions carefully chosen to support VS 2019 Update 11. -->
     <PackageVersion Update="System.Collections.Immutable" Version="5.0.0" />
     <PackageVersion Update="System.Memory" Version="4.5.4" />
-    <PackageVersion Update="System.Reflection.Metadata" Version="5.0.0" />
-    <PackageVersion Update="System.Runtime.CompilerServices.Unsafe" Version="5.0.0" />
+    <PackageVersion Update="System.Reflection.Metadata" Version="8.0.0" />
+    <PackageVersion Update="System.Runtime.CompilerServices.Unsafe" Version="6.1.0" />
   </ItemGroup>
   <ItemGroup>
     <!-- Put repo-specific GlobalPackageReference items in this group. -->