Bump Ardalis.GuardClauses from 3.3.0 to 4.0.1 (#1073)

Bumps [Ardalis.GuardClauses](https://github.com/ardalis/guardclauses) from 3.3.0 to 4.0.1.
- [Release notes](https://github.com/ardalis/guardclauses/releases)
- [Commits](https://github.com/ardalis/guardclauses/commits)

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

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj

@@ -20,7 +20,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Ardalis.GuardClauses" Version="3.3.0" />
+		<PackageReference Include="Ardalis.GuardClauses" Version="4.0.1" />
 		<PackageReference Include="CommandLiners.MonoOptions" Version="1.0.36" />
 		<PackageReference Include="HtmlAgilityPack" Version="1.11.37" />
 		<PackageReference Include="MailKit" Version="2.15.0" />