Merge pull request #830 from sys27/dependabot/nuget/dev/System.Collections.Immutable-9.0.1

Bump System.Collections.Immutable from 9.0.0 to 9.0.1

Author: sys27

Directory.Packages.props

@@ -7,7 +7,7 @@
     <PackageVersion Include="NUnit.Analyzers" Version="4.6.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
-    <PackageVersion Include="System.Collections.Immutable" Version="9.0.0" />
+    <PackageVersion Include="System.Collections.Immutable" Version="9.0.1" />
     <PackageVersion Include="CommandLineParser" Version="2.9.1" />
     <PackageVersion Include="BenchmarkDotNet" Version="0.14.0" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.3" />