Bump TUnit from 1.11.56 to 1.12.3

---
updated-dependencies:
- dependency-name: TUnit
  dependency-version: 1.12.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -69,7 +69,7 @@
     <PackageVersion Include="TestHost.Abstracts" Version="2.0.0" />
     <PackageVersion Include="Testcontainers.MongoDb" Version="4.10.0" />
     <PackageVersion Include="Testcontainers.MsSql" Version="4.10.0" />
-    <PackageVersion Include="TUnit" Version="1.11.56" />
+    <PackageVersion Include="TUnit" Version="1.12.3" />
     <PackageVersion Include="Twilio" Version="7.14.1" />
     <PackageVersion Include="Verify.TUnit" Version="31.9.4" />
     <PackageVersion Include="YamlDotNet" Version="16.3.0" />