Update kafka-clients to 3.9.1 in series/3.x

[scala-steward]

About this PR

📦 Updates org.apache.kafka:kafka-clients from 3.9.0 to 3.9.1

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updates.ignore = [ { groupId = "org.apache.kafka", artifactId = "kafka-clients" } ]

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dependencyOverrides = [{
  pullRequests = { frequency = "30 days" },
  dependency = { groupId = "org.apache.kafka", artifactId = "kafka-clients" }
}]

^{labels: library-update, early-semver-patch, semver-spec-patch, commit-count:1}

[Awethon]

@vlovgr kafka 3.9.1 contains a fix for java 24+ security changes
would be great to make a new release with it

https://issues.apache.org/jira/browse/KAFKA-17078

The error without it:

Caused by: org.apache.kafka.common.KafkaException: org.apache.kafka.common.errors.SaslAuthenticationException: Failed to configure SaslClientAuthenticator
	at org.apache.kafka.common.network.SaslChannelBuilder.buildChannel(SaslChannelBuilder.java:251)
	at org.apache.kafka.common.network.Selector.buildAndAttachKafkaChannel(Selector.java:356)
	... 27 common frames omitted
Caused by: org.apache.kafka.common.errors.SaslAuthenticationException: Failed to configure SaslClientAuthenticator
Caused by: java.lang.UnsupportedOperationException: getSubject is not supported
	at java.base/javax.security.auth.Subject.getSubject(Unknown Source)
	at org.apache.kafka.common.security.authenticator.SaslClientCallbackHandler.handle(SaslClientCallbackHandler.java:58)

[vlovgr]

@Awethon merged and released in v3.9.1.