Update dotnet monorepo to 5.6.0

Author: renovate[bot]

Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="DNNE" Version="2.1.2" />
     <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.1" />
     <PackageVersion Include="Microsoft.CodeAnalysis" Version="$(CodeAnalysisVersion)" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="5.3.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="5.6.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="$(CodeAnalysisVersion)" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="$(CodeAnalysisVersion)" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.CodeFix.Testing" Version="$(CodefixTestingVersion)" />

test/Directory.Packages.props

@@ -3,7 +3,7 @@
   <Import Project="$([MSBuild]::GetPathOfFileAbove($(MSBuildThisFile), $(MSBuildThisFileDirectory)..))" />
 
   <PropertyGroup>
-    <CodeAnalysisVersionForTests>5.3.0</CodeAnalysisVersionForTests>
+    <CodeAnalysisVersionForTests>5.6.0</CodeAnalysisVersionForTests>
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Update="Microsoft.CodeAnalysis" Version="$(CodeAnalysisVersionForTests)" />