chore(deps): Bump the tunit group with 1 update

Bumps TUnit from 0.73.19 to 0.87.8

---
updated-dependencies:
- dependency-name: TUnit
  dependency-version: 0.87.8
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: tunit
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Directory.Packages.props

@@ -98,7 +98,7 @@
     <PackageVersion Include="Testcontainers.Redpanda" Version="$(VersionTestContainers)" />
     <PackageVersion Include="Testcontainers.ServiceBus" Version="$(VersionTestContainers)" />
     <PackageVersion Include="TngTech.ArchUnitNET.TUnit" Version="0.12.3" />
-    <PackageVersion Include="TUnit" Version="0.73.19" />
+    <PackageVersion Include="TUnit" Version="0.87.8" />
     <PackageVersion Include="Verify.TUnit" Version="31.0.2" />
   </ItemGroup>
 </Project>