Bump Argon and Verify in /src

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

Updates `Argon` from 0.26.0 to 0.26.0
- [Release notes](https://github.com/SimonCropp/Argon/releases)
- [Commits](SimonCropp/Argon@0.26.0...0.26.0)

Updates `Verify` from 28.7.1 to 28.8.1
- [Release notes](https://github.com/VerifyTests/Verify/releases)
- [Commits](https://github.com/VerifyTests/Verify/commits)

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

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

src/Directory.Packages.props

@@ -14,7 +14,7 @@
     <PackageVersion Include="Polyfill" Version="7.11.0" />
     <PackageVersion Include="ProjectDefaults" Version="1.0.147" />
     <PackageVersion Include="Swashbuckle.AspNetCore" Version="7.2.0" />
-    <PackageVersion Include="Verify" Version="28.7.1" />
+    <PackageVersion Include="Verify" Version="28.8.1" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.Http" Version="6.4.1" />
     <PackageVersion Include="Verify.XunitV3" Version="28.7.1" />