Bump Verify.Xunit and Argon in /src (#531)

Bumps [Verify.Xunit](https://github.com/VerifyTests/Verify) and [Argon](https://github.com/SimonCropp/Argon). These dependencies needed to be updated together.

Updates `Verify.Xunit` from 26.1.2 to 26.1.5
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](VerifyTests/Verify@26.1.2...26.1.5)

Updates `Argon` from 0.17.0 to 0.19.0
- [Release notes](https://github.com/SimonCropp/Argon/releases)
- [Commits](https://github.com/SimonCropp/Argon/commits/0.19.0)

---
updated-dependencies:
- dependency-name: Verify.Xunit
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Argon
  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>

src/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="System.IO.Compression.ZipFile" Version="4.3.0" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="System.Text.Json" Version="8.0.4" />
-    <PackageVersion Include="Verify.Xunit" Version="26.1.2" />
+    <PackageVersion Include="Verify.Xunit" Version="26.1.5" />
     <PackageVersion Include="Xunit" Version="2.9.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
   </ItemGroup>