MINOR: Gradle version update: 9.2.1 -->> 9.3.1

[dejan2609]

release notes: - https://docs.gradle.org/9.3.0/release-notes.html -
https://docs.gradle.org/9.3.1/release-notes.html

ℹ️ Notes:

• done by-the-book (procedure mentioned here gradle/wrapper/README.md
  was followed)
• it makes sense to merge this with Gradle Shadow plugin version
  upgrade: KAFKA-19761 Gradle Shadow plugin version upgrade: 8.3.9 -->> 9.3.1 #20866

Reviewers: Chia-Ping Tsai chia7712@gmail.com

[dejan2609]

FYI @chia7712

[github-actions]

A label of 'needs-attention' was automatically added to this PR in order to raise the
attention of the committers. Once this issue has been triaged, the triage label
should be removed to prevent this automation from happening again.

[github-actions]

A label of 'needs-attention' was automatically added to this PR in order to raise the
attention of the committers. Once this issue has been triaged, the triage label
should be removed to prevent this automation from happening again.

[chia7712]

* What went wrong:
Execution failed for task ':examples:spotlessJavaCheck'.
> There were 8 lint error(s), they must be fixed or suppressed.
  src/main/java/kafka/examples/Consumer.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/ExactlyOnceMessageProcessor.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/KafkaConsumerProducerDemo.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/KafkaExactlyOnceDemo.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/KafkaProperties.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/Producer.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/TransactionalClientDemo.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  src/main/java/kafka/examples/Utils.java:LINE_UNDEFINED removeUnusedImports(java.lang.NoClassDefFoundError) com/google/googlejavaformat/java/RemoveUnusedImports (...)
  Resolve these lints or suppress with `suppressLintsFor`

These errors happen on my local machine sometimes. I'll dig into it.

[chia7712]

someone has reported it (diffplug/spotless#2850). I will revert this commit for now

[chia7712]

I've opened https://issues.apache.org/jira/browse/KAFKA-20182 to trace this issue

[dejan2609]

@chia7712 Sorry for this, I should have checked. I subscribed to that spotless issue and will try to redeem myself.