Bump Ardalis.GuardClauses from 4.5.0 to 4.6.0 (#770)

Bumps Ardalis.GuardClauses from 4.5.0 to 4.6.0.

---
updated-dependencies:
- dependency-name: Ardalis.GuardClauses
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Steve Smith <steve@kentsmiths.com>

Directory.Packages.props

@@ -1,6 +1,6 @@
 <Project>
   <ItemGroup>
-    <PackageVersion Include="Ardalis.GuardClauses" Version="4.5.0" />
+    <PackageVersion Include="Ardalis.GuardClauses" Version="4.6.0" />
     <PackageVersion Include="Ardalis.HttpClientTestExtensions" Version="4.2.0" />
     <PackageVersion Include="Ardalis.ListStartupServices" Version="1.1.4" />
     <PackageVersion Include="Ardalis.Result" Version="8.0.0" />