Bump Argu from 6.1.4 to 6.1.5

Bumps [Argu](https://github.com/fsprojects/Argu) from 6.1.4 to 6.1.5.
- [Release notes](https://github.com/fsprojects/Argu/releases)
- [Changelog](https://github.com/fsprojects/Argu/blob/master/RELEASE_NOTES.md)
- [Commits](fsprojects/Argu@6.1.4...6.1.5)

---
updated-dependencies:
- dependency-name: Argu
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

tests/Tests.YamlRunner/Tests.YamlRunner.fsproj

@@ -31,7 +31,7 @@
   <ItemGroup>
     <PackageReference Update="FSharp.Core" Version="8.0.101" />
 
-    <PackageReference Include="Argu" Version="6.1.4" />
+    <PackageReference Include="Argu" Version="6.1.5" />
     <PackageReference Include="FSharp.Data" Version="6.3.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="SemanticVersioning" Version="2.0.2" />