chore(deps): update dependency roslynator.analyzers to 4.12.8

Author: renovate[bot]

src/Directory.Build.props

@@ -58,7 +58,7 @@
 
   <ItemGroup>
     <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.556" PrivateAssets="all" />
-    <PackageReference Include="Roslynator.Analyzers" Version="4.12.4" PrivateAssets="all" />
+    <PackageReference Include="Roslynator.Analyzers" Version="4.12.8" PrivateAssets="all" />
   </ItemGroup>
   <ItemGroup>
     <AdditionalFiles Include="$(MSBuildThisFileDirectory)stylecop.json" Link="stylecop.json" />