chore(deps): update dependency icsharpcode.decompiler to v9

Author: renovate[bot]

src/Directory.Build.props

@@ -49,7 +49,7 @@
     <PackageReference Include="MSTest.TestFramework" Version="3.5.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.2" />
     <PackageReference Include="ReactiveMarbles.NuGet.Helpers" Version="1.1.1" />
-    <PackageReference Include="ICSharpCode.Decompiler" Version="8.2.0.7535" />
+    <PackageReference Include="ICSharpCode.Decompiler" Version="9.0.0.7889" />
   </ItemGroup>
 
   <ItemGroup>