Bump System.CodeDom from 9.0.0 to 9.0.1 in /src (#481)

Author: dependabot[bot]

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageVersion Include="Polyfill" Version="7.12.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
-    <PackageVersion Include="System.CodeDom" Version="9.0.0" />
+    <PackageVersion Include="System.CodeDom" Version="9.0.1" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="UnicodeInformation" Version="2.7.1" />
     <PackageVersion Include="Verify.XunitV3" Version="28.6.1" />