Bump the xunit group with 2 updates (#317)

Bumps the xunit group with 2 updates: [xunit](https://github.com/xunit/xunit) and [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit).


Updates `xunit` from 2.8.0 to 2.8.1
- [Commits](xunit/xunit@2.8.0...2.8.1)

Updates `xunit.runner.visualstudio` from 2.8.0 to 2.8.1
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.8.0...2.8.1)

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

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

tests/SimpleAccounting.IntegrationTests/SimpleAccounting.IntegrationTests.csproj

@@ -13,8 +13,8 @@
     <!-- license is BSD-3-Clause -->
     <PackageReference Include="NSubstitute" Version="5.1.0"/>
     <!-- license is apache 2.0 -->
-    <PackageReference Include="xunit" Version="2.8.0"/>
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
+    <PackageReference Include="xunit" Version="2.8.1"/>
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>

tests/SimpleAccounting.UnitTests/SimpleAccounting.UnitTests.csproj

@@ -17,8 +17,8 @@
     <!-- license is BSD-3-Clause -->
     <PackageReference Include="NSubstitute" Version="5.1.0" />
     <!-- license is apache 2.0 -->
-    <PackageReference Include="xunit" Version="2.8.0"/>
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
+    <PackageReference Include="xunit" Version="2.8.1"/>
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>