Bump Verify from 26.5.0 to 26.6.0 in /src (#671)

Author: dependabot[bot]

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="NServiceBus" Version="9.1.1" />
     <PackageVersion Include="Polyfill" Version="6.9.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.135" />
-    <PackageVersion Include="Verify" Version="26.5.0" />
+    <PackageVersion Include="Verify" Version="26.6.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.0" />
     <PackageVersion Include="Verify.XunitV3" Version="26.5.0-beta.1" />
     <PackageVersion Include="xunit.v3" Version="0.3.0-pre.18" />