Bump bunit from 1.40.0 to 2.1.1

---
updated-dependencies:
- dependency-name: bunit
  dependency-version: 2.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

roles/tests-unit/files/FWO.Test/FWO.Test.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="bunit" Version="1.40.0" />
+    <PackageReference Include="bunit" Version="2.1.1" />
     <PackageReference Include="PuppeteerSharp" Version="20.2.2" />
     <PackageReference Include="NUnit" Version="4.4.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="5.1.0" />