deps: Bump xunit.runner.visualstudio from 3.0.1 to 3.1.5 (#133)

---
updated-dependencies:
- dependency-name: xunit.runner.visualstudio
  dependency-version: 3.1.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

samples/dotnet/saml-sp-login/tests/saml-sp-login.tests.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.0" />
     <!-- Override transitive dep with vulnerable System.Drawing.Common 4.7.0 (NU1904 / GHSA-rxg9-xrhp-64gj). -->
     <PackageReference Include="System.Drawing.Common" Version="8.0.10" />