chore(deps): update dependency confluent.kafka to 2.14.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Confluent.Kafka	2.14.0 → 2.14.2

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Release Notes

confluentinc/confluent-kafka-dotnet (Confluent.Kafka)

v2.14.2

Enhancements

• References librdkafka.redist 2.14.2. Refer to the librdkafka v2.14.2 release notes for more information.
• Add IHeader overload to Headers.Add() method (#​2604)

Fixes

• Handle anyOf/allOf in JSON transforms (#​2611)
• Allow encrypting enum for JObject in dotnet (#​2615)
• Fix 'occured' -> 'occurred' typo in ConsumeException XML doc comments (#​2609)

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