Bump Confluent.Kafka from 2.6.1 to 2.11.1

---
updated-dependencies:
- dependency-name: Confluent.Kafka
  dependency-version: 2.11.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

tests/Microcks.Testcontainers.Tests/Microcks.Testcontainers.Tests.csproj

@@ -10,7 +10,7 @@
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
     <PackageReference Include="RabbitMQ.Client" Version="7.1.2" />
     <PackageReference Include="RestAssured.Net" Version="4.7.0" />
-    <PackageReference Include="Confluent.Kafka" Version="2.6.1" />
+    <PackageReference Include="Confluent.Kafka" Version="2.11.1" />
     <PackageReference Include="TestContainers.Kafka" Version="4.4.0" />
     <PackageReference Include="TestContainers.Keycloak" Version="4.4.0" />
     <PackageReference Include="Testcontainers.RabbitMq" Version="4.4.0" />