chore(deps): update dependency verify.sourcegenerators to v2

Author: renovate[bot]

Diff for: src/directory.packages.props

@@ -32,7 +32,7 @@
 
   <ItemGroup>
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
-    <PackageVersion Include="Verify.SourceGenerators" Version="1.2.0" />
+    <PackageVersion Include="Verify.SourceGenerators" Version="2.2.0" />
     <PackageVersion Include="Verify.Xunit" Version="14.14.1" />
     <PackageVersion Include="ReactiveMarbles.SourceGenerator.TestNuGetHelper" Version="1.3.1" />
   </ItemGroup>